add weight metric for adding network links
diff --git a/src/emuvim/api/zerorpc/compute.py b/src/emuvim/api/zerorpc/compute.py
index 6e4a083..f5d0799 100644
--- a/src/emuvim/api/zerorpc/compute.py
+++ b/src/emuvim/api/zerorpc/compute.py
@@ -56,7 +56,7 @@
     def __init__(self, dcs):
         self.dcs = dcs
 
-    def compute_action_start(self, dc_label, compute_name, image, command, network):
+    def compute_action_start(self, dc_label, compute_name, image, network=None, command=None):
         """
         Start a new compute instance: A docker container
         :param dc_label: name of the DC