Close issue25147: use C implementation of OrderedDict

diff --git a/Lib/enum.py b/Lib/enum.py
index 616b2eac15094c3615d60753cf1f4a0dedd3a1a3..6284b9bb7eb0090773d6ed1f5ba7aaf38a6edd16 100644 (file)
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -1,7 +1,12 @@
 import sys
-from collections import OrderedDict
 from types import MappingProxyType, DynamicClassAttribute
 
+try:
+    from _collections import OrderedDict
+except ImportError:
+    from collections import OrderedDict
+
+
 __all__ = ['Enum', 'IntEnum', 'unique']