Try to import MutableMapping from collections.abc (html5lib#403)

Note that collections.abc has been added in Python 3.3. Fixes html5lib#402
Sid532001 · Oct 1, 2018 · 4f92357 · 4f92357
1 parent 0ba6628
commit 4f92357
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diff --git a/html5lib/_trie/_base.py b/html5lib/_trie/_base.py
@@ -1,6 +1,9 @@
 from __future__ import absolute_import, division, unicode_literals
 
-from collections import Mapping
+try:
+ from collections.abc import Mapping
+except ImportError: # Python 2.7
+ from collections import Mapping
 
 
 class Trie(Mapping):

diff --git a/html5lib/treebuilders/dom.py b/html5lib/treebuilders/dom.py
@@ -1,7 +1,10 @@
 from __future__ import absolute_import, division, unicode_literals
 
 
-from collections import MutableMapping
+try:
+ from collections.abc import MutableMapping
+except ImportError: # Python 2.7
+ from collections import MutableMapping
 from xml.dom import minidom, Node
 import weakref