Enable black in tox.ini

[osm/PLA.git] / osm_pla / test / test_mznmodels.py

diff --git a/osm_pla/test/test_mznmodels.py b/osm_pla/test/test_mznmodels.py
index b32ec94..e39dfc6 100644 (file)
--- a/osm_pla/test/test_mznmodels.py
+++ b/osm_pla/test/test_mznmodels.py
@@ -1,4 +1,3 @@
-
 # Copyright 2019 ArctosLabs Scandinavia AB
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -15,7 +14,7 @@
 # limitations under the License.
 
 # Note:
-# This unit test file is generated - 
+# This unit test file is generated -
 # from: c:\Users\LG\Desktop\plarepo\documents\Test\pla_algo_test (pr_update_4).xlsx
 # by code generator: mzntestcasegenerator.py
 # at: 2019-12-04 09:26:38.412430
@@ -31,165 +30,785 @@ from osm_pla.placement.mznplacement import MznPlacementConductor, MznModelGenera
 class TestMznModels(TestCase):
     def test_mznmodel_scenario1_subtestcase1(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase2(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim33333333_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '33333333-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "33333333-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim33333333_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase3(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim22222222_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '22222222-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "22222222-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim22222222_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase4(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '44444444-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '22222222-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "44444444-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "22222222-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase5(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim88888888_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '88888888-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "88888888-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim88888888_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase6(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim99999999_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '99999999-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "99999999-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim99999999_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase7(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim11111111_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim33333333_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
@@ -197,149 +816,697 @@ class TestMznModels(TestCase):
         expected_result = [{}]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim11111111_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim33333333_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario1_subtestcase8(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 120, 'jitter': 20}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 120, "jitter": 20},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario2_subtestcase1(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario2_subtestcase2(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '44444444-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '22222222-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '22222222-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "44444444-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "22222222-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "22222222-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario2_subtestcase3(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '66666666-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '66666666-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "66666666-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "66666666-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario2_subtestcase4(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario2_subtestcase5(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim33333333_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
@@ -347,24 +1514,107 @@ class TestMznModels(TestCase):
         expected_result = [{}]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim33333333_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario2_subtestcase6(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170'], 'vim_account': 'vim66666666_38f5_438d_b8ee_3f93b3531f87'}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                    "vim_account": "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
@@ -372,49 +1622,223 @@ class TestMznModels(TestCase):
         expected_result = [{}]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170'], 'vim_account': 'vim66666666_38f5_438d_b8ee_3f93b3531f87'}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                    "vim_account": "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario3_subtestcase1(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 3}, {'cp_refs': ['2', '3'], 'latency': 25, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 3},
+                {"cp_refs": ["2", "3"], "latency": 25, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario3_subtestcase2(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim22222222_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 3}, {'cp_refs': ['2', '3'], 'latency': 25, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 3},
+                {"cp_refs": ["2", "3"], "latency": 25, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
@@ -422,74 +1846,343 @@ class TestMznModels(TestCase):
         expected_result = [{}]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim22222222_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario3_subtestcase3(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 3}, {'cp_refs': ['2', '3'], 'latency': 25, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 3},
+                {"cp_refs": ["2", "3"], "latency": 25, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario3_subtestcase4(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim88888888_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 3}, {'cp_refs': ['2', '3'], 'latency': 25, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 3},
+                {"cp_refs": ["2", "3"], "latency": 25, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '88888888-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "88888888-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim88888888_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150']}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario3_subtestcase5(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim99999999_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170'], 'vim_account': 'vim88888888_38f5_438d_b8ee_3f93b3531f87'}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 3}, {'cp_refs': ['2', '3'], 'latency': 25, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                    "vim_account": "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 3},
+                {"cp_refs": ["2", "3"], "latency": 25, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
@@ -497,124 +2190,627 @@ class TestMznModels(TestCase):
         expected_result = [{}]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim99999999_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170'], 'vim_account': 'vim88888888_38f5_438d_b8ee_3f93b3531f87'}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                    "vim_account": "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario3_subtestcase6(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim99999999_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 3}, {'cp_refs': ['2', '3'], 'latency': 25, 'jitter': 6}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 3},
+                {"cp_refs": ["2", "3"], "latency": 25, "jitter": 6},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '99999999-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '77777777-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}]
+        expected_result = [
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "99999999-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "77777777-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim77777777_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['10,15,30,30,100,70,40,150,150,150'], 'vim_account': 'vim99999999_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '3', 'vnf_price_per_vim': ['30,30,60,40,100,90,40,150,200,170']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["10,15,30,30,100,70,40,150,150,150"],
+                    "vim_account": "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["30,30,60,40,100,90,40,150,200,170"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario4_subtestcase1(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '4'], 'latency': 50, 'jitter': 10}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 10}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "4"], "latency": 50, "jitter": 10},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 10},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}, {'vimAccountId': '00000000-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '4'}]
+        expected_result = [
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+            {
+                "vimAccountId": "00000000-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "4",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario4_subtestcase2(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim22222222_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '4'], 'latency': 50, 'jitter': 10}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 10}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "4"], "latency": 50, "jitter": 10},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 10},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '22222222-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '44444444-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}, {'vimAccountId': '66666666-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '4'}]
+        expected_result = [
+            {
+                "vimAccountId": "22222222-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "44444444-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+            {
+                "vimAccountId": "66666666-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "4",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim22222222_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario4_subtestcase3(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '4'], 'latency': 50, 'jitter': 10}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 10}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "4"], "latency": 50, "jitter": 10},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 10},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
         # run the model
-        expected_result = [{'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '1'}, {'vimAccountId': '66666666-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '2'}, {'vimAccountId': '66666666-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '3'}, {'vimAccountId': '55555555-38f5-438d-b8ee-3f93b3531f87', 'member-vnf-index': '4'}]
+        expected_result = [
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "1",
+            },
+            {
+                "vimAccountId": "66666666-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "2",
+            },
+            {
+                "vimAccountId": "66666666-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "3",
+            },
+            {
+                "vimAccountId": "55555555-38f5-438d-b8ee-3f93b3531f87",
+                "member-vnf-index": "4",
+            },
+        ]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim55555555_38f5_438d_b8ee_3f93b3531f87'}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")
+
     def test_mznmodel_scenario4_subtestcase4(self):
         # generate the model
-        ns_placement_data = {'vim_accounts': ['vim00000000_38f5_438d_b8ee_3f93b3531f87', 'vim11111111_38f5_438d_b8ee_3f93b3531f87', 'vim22222222_38f5_438d_b8ee_3f93b3531f87', 'vim33333333_38f5_438d_b8ee_3f93b3531f87', 'vim44444444_38f5_438d_b8ee_3f93b3531f87', 'vim55555555_38f5_438d_b8ee_3f93b3531f87', 'vim66666666_38f5_438d_b8ee_3f93b3531f87', 'vim77777777_38f5_438d_b8ee_3f93b3531f87', 'vim88888888_38f5_438d_b8ee_3f93b3531f87', 'vim99999999_38f5_438d_b8ee_3f93b3531f87'],
-                             'trp_link_latency' : [[0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767], [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767], [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767], [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0]],
-                             'trp_link_jitter' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0]],
-                             'trp_link_price_list' : [[0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767], [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767], [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767], [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15], [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0]],
-                             'ns_desc' : [{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim00000000_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}],
-                             'vld_desc' : [{'cp_refs': ['1', '2'], 'latency': 120, 'jitter': 20}, {'cp_refs': ['2', '4'], 'latency': 50, 'jitter': 10}, {'cp_refs': ['2', '3'], 'latency': 20, 'jitter': 10}],
-                             'generator_data': {'file': __file__ ,'time': datetime.datetime.now()}
-                            }
-        
+        ns_placement_data = {
+            "vim_accounts": [
+                "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                "vim11111111_38f5_438d_b8ee_3f93b3531f87",
+                "vim22222222_38f5_438d_b8ee_3f93b3531f87",
+                "vim33333333_38f5_438d_b8ee_3f93b3531f87",
+                "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                "vim55555555_38f5_438d_b8ee_3f93b3531f87",
+                "vim66666666_38f5_438d_b8ee_3f93b3531f87",
+                "vim77777777_38f5_438d_b8ee_3f93b3531f87",
+                "vim88888888_38f5_438d_b8ee_3f93b3531f87",
+                "vim99999999_38f5_438d_b8ee_3f93b3531f87",
+            ],
+            "trp_link_latency": [
+                [0, 30, 70, 80, 32767, 32767, 32767, 32767, 32767, 32767],
+                [30, 0, 75, 60, 32767, 32767, 32767, 32767, 32767, 32767],
+                [70, 75, 0, 40, 100, 32767, 32767, 32767, 32767, 32767],
+                [80, 60, 40, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 100, 32767, 0, 5, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 0, 5, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 5, 5, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 30, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 30, 0, 20],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 20, 20, 0],
+            ],
+            "trp_link_jitter": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 5, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 5, 32767, 0, 4, 4, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 0, 10, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 4, 10, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 1, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 0, 1],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 1, 1, 0],
+            ],
+            "trp_link_price_list": [
+                [0, 5, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 0, 5, 10, 32767, 32767, 32767, 32767, 32767, 32767],
+                [5, 5, 0, 10, 10, 32767, 32767, 32767, 32767, 32767],
+                [10, 10, 10, 0, 32767, 32767, 32767, 32767, 32767, 32767],
+                [32767, 32767, 10, 32767, 0, 20, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 0, 20, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 20, 20, 0, 32767, 32767, 32767],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 0, 15, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 0, 15],
+                [32767, 32767, 32767, 32767, 32767, 32767, 32767, 15, 15, 0],
+            ],
+            "ns_desc": [
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+            ],
+            "vld_desc": [
+                {"cp_refs": ["1", "2"], "latency": 120, "jitter": 20},
+                {"cp_refs": ["2", "4"], "latency": 50, "jitter": 10},
+                {"cp_refs": ["2", "3"], "latency": 20, "jitter": 10},
+            ],
+            "generator_data": {"file": __file__, "time": datetime.datetime.now()},
+        }
+
         mg = MznModelGenerator(logging.getLogger(__name__))
         test_mzn_model = mg.create_model(ns_placement_data)
 
@@ -622,10 +2818,32 @@ class TestMznModels(TestCase):
         expected_result = [{}]
 
         mpc = MznPlacementConductor(logging.getLogger(__name__))
-        placement = mpc._run_placement_model(mzn_model=test_mzn_model, ns_desc=[{'vnf_id': '1', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim00000000_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '2', 'vnf_price_per_vim': ['15,20,40,40,110,80,50,110,160,210']}, {'vnf_id': '3', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200'], 'vim_account': 'vim44444444_38f5_438d_b8ee_3f93b3531f87'}, {'vnf_id': '4', 'vnf_price_per_vim': ['5,10,30,30,100,70,40,100,150,200']}])
+        placement = mpc._run_placement_model(
+            mzn_model=test_mzn_model,
+            ns_desc=[
+                {
+                    "vnf_id": "1",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim00000000_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "2",
+                    "vnf_price_per_vim": ["15,20,40,40,110,80,50,110,160,210"],
+                },
+                {
+                    "vnf_id": "3",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                    "vim_account": "vim44444444_38f5_438d_b8ee_3f93b3531f87",
+                },
+                {
+                    "vnf_id": "4",
+                    "vnf_price_per_vim": ["5,10,30,30,100,70,40,100,150,200"],
+                },
+            ],
+        )
         # sort the result to ease assert with expected result
         if not placement[0]:
             sorted_placement = placement
         else:
-            sorted_placement = sorted(placement, key=lambda k: k['member-vnf-index'])
-        self.assertEqual(expected_result, sorted_placement, 'Faulty syntax or content')
\ No newline at end of file
+            sorted_placement = sorted(placement, key=lambda k: k["member-vnf-index"])
+        self.assertEqual(expected_result, sorted_placement, "Faulty syntax or content")