Updating urllib related imports and usage. (Using six)
diff --git a/googleapiclient/model.py b/googleapiclient/model.py
index 9be5a59..2402d84 100644
--- a/googleapiclient/model.py
+++ b/googleapiclient/model.py
@@ -26,7 +26,8 @@
 
 import json
 import logging
-import urllib
+
+from six.moves.urllib.parse import urlencode
 
 from googleapiclient import __version__
 from .errors import HttpError
@@ -170,7 +171,7 @@
         if isinstance(value, six.text_type) and callable(value.encode):
           value = value.encode('utf-8')
         astuples.append((key, value))
-    return '?' + urllib.urlencode(astuples)
+    return '?' + urlencode(astuples)
 
   def _log_response(self, resp, content):
     """Logs debugging information about the response if requested."""