Backport pull request #378

fix test suite warnings

Author: digitalresistor

src/webob/compat.py

@@ -51,8 +51,10 @@ def native_(s, encoding='latin-1', errors='strict'):
 
 try:
     from collections.abc import MutableMapping
+    from collections.abc import Iterable
 except ImportError:
     from collections import MutableMapping
+    from collections import Iterable
 
 if PY3:
     from urllib import parse

src/webob/cookies.py

@@ -1,5 +1,3 @@
-import collections
-
 import base64
 import binascii
 import hashlib