groupdict is not a subscriptable object

piphone.py

@@ -159,7 +159,7 @@ def sanitize_phonenumber(number):
         groups = re.match(bl_re, number)
         if groups is not None:
             # We matched, so we're blacklisted
-            raise ValueError('{} is blacklisted. Reason: {}', (number, groups.groupdict().keys[0],))
+            raise ValueError('{} is blacklisted. Reason: {}', (number, groups.groupdict.keys[0],))
     return number
 
 @asyncio.coroutine