deprecation about MutableMapping

Author: jreback

pandas/compat/__init__.py

@@ -139,7 +139,7 @@ def lfilter(*args, **kwargs):
     Hashable = collections.abc.Hashable
     Iterable = collections.abc.Iterable
     Mapping = collections.abc.Mapping
-    MutableMapping = collections.abc.MutableMapping
+    MutableMapping = collections.MutableMapping
     Sequence = collections.abc.Sequence
     Sized = collections.abc.Sized
     Set = collections.abc.Set

pandas/compat/chainmap_impl.py

@@ -1,11 +1,4 @@
-import sys
-
-PY3 = sys.version_info[0] >= 3
-
-if PY3:
-    from collections.abc import MutableMapping
-else:
-    from collections import MutableMapping
+from collections import MutableMapping
 
 try:
     from thread import get_ident