X-Git-Url: https://osm.etsi.org/gitweb/?p=osm%2FNBI.git;a=blobdiff_plain;f=osm_nbi%2Fbase_topic.py;h=1bc906c2b4d63594f84a2a129dac715125e35e7e;hp=70c8dff5eac55ce0bed458a6d11276d32cfbde46;hb=45bd94c2a096f53a5692f438aa5148c3d42631fa;hpb=15a1f68badbe4865b7abb3cb9ac816ed963d4b63

diff --git a/osm_nbi/base_topic.py b/osm_nbi/base_topic.py
index 70c8dff..1bc906c 100644
--- a/osm_nbi/base_topic.py
+++ b/osm_nbi/base_topic.py
@@ -30,6 +30,21 @@ class EngineException(Exception):
         super(Exception, self).__init__(message)
 
 
+def deep_get(target_dict, key_list):
+    """
+    Get a value from target_dict entering in the nested keys. If keys does not exist, it returns None
+    Example target_dict={a: {b: 5}}; key_list=[a,b] returns 5; both key_list=[a,b,c] and key_list=[f,h] return None
+    :param target_dict: dictionary to be read
+    :param key_list: list of keys to read from  target_dict
+    :return: The wanted value if exist, None otherwise
+    """
+    for key in key_list:
+        if not isinstance(target_dict, dict) or key not in target_dict:
+            return None
+        target_dict = target_dict[key]
+    return target_dict
+
+
 def get_iterable(input_var):
     """
     Returns an iterable, in case input_var is None it just returns an empty tuple