Update imports_utils.py

imports_utils.py

@@ -320,6 +320,7 @@ def accessibilityToLivability (DistanceMatrix,accessibilityInputs, SubdomainAttr
 def findUniqueDomains (livabilityMapperDict):
     # find a set of unique domains, to which subdomains are aggregated    
     temp = []
+    domain_list = []
     for key, values in livabilityMapperDict.items():
         domain = livabilityMapperDict[key]['domain']
         for item in domain: