ADD: New helper functions

netdb_client/util.py

@@ -18,7 +18,19 @@ class ArgumentParser(argparse.ArgumentParser):
         self.add_argument('--api-version', default=default_api_version,
                           help='webapi version')
 
-    def parse_args(self):
-        args = super(ArgumentParser, self).parse_args()
+    def parse_args(self, args=None, namespace=None):
+        args = super(ArgumentParser, self).parse_args(args, namespace)
         return args
 
+
+def dict_by_value_of_list(array, value):
+    return ((item[value], item) for item in array)
+
+
+def dict_of_lists_by_value_of_list(array, value):
+    res = {}
+    for item in array:
+        if not item[value] in res:
+            res[item[value]] = []
+        res[item[value]].append(item)
+    return res