fix error handling

Author: lohanidamodar

templates/python/package/client.py.twig

@@ -86,10 +86,10 @@ class Client:
 
             return response._content
         except Exception as e:
-            if response:
-                raise {{spec.title | caseUcfirst}}Exception(response.json()['message'], response.status_code, response.json())
+            if e.response:
+                raise {{spec.title | caseUcfirst}}Exception(e.response.json()['message'], e.response.status_code, e.response.json())
             else:
-                raise {{spec.title | caseUcfirst}}Exception(e.message)
+                raise {{spec.title | caseUcfirst}}Exception(e)
 
     def flatten(self, data, prefix=''):
         output = {}