Prefer importing ABCs from collections.abc

jwodder · jwodder · commit 13ec6c228477 · 2018-09-28T16:49:58.000Z
diff --git a/jsonschema/compat.py b/jsonschema/compat.py
@@ -3,9 +3,9 @@
 
 
 try:
-    from collections import MutableMapping, Sequence  # noqa
-except ImportError:
     from collections.abc import MutableMapping, Sequence  # noqa
+except ImportError:
+    from collections import MutableMapping, Sequence  # noqa
 
 PY3 = sys.version_info[0] >= 3
 
