[New-bugs-announce] [issue18995] Enum does not work with reversed

[Vajrasky Kok]

New submission from Vajrasky Kok:

cutecat at amiau:~/cpython$ cat /tmp/innerplanets.py 
from enum import Enum

class innerplanets(Enum):
    mercury = 1
    venus = 2
    earth = 3
    mars = 4

for planet in innerplanets:
    print(planet)
for planet in reversed(innerplanets):
    print(planet)
cutecat at amiau:~/cpython$ ./python /tmp/innerplanets.py 
innerplanets.mercury
innerplanets.venus
innerplanets.earth
innerplanets.mars
Traceback (most recent call last):
  File "/tmp/innerplanets.py", line 11, in <module>
    for planet in reversed(innerplanets):
  File "/home/cutecat/cpython/Lib/enum.py", line 255, in __getitem__
    return cls._member_map_[name]
KeyError: 3

Attached the patch to add support for reversed in enum.

----------
components: Library (Lib)
files: add_reversed_support_for_enum.patch
keywords: patch
messages: 197428
nosy: ethan.furman, vajrasky
priority: normal
severity: normal
status: open
title: Enum does not work with reversed
type: behavior
versions: Python 3.4
Added file: http://bugs.python.org/file31711/add_reversed_support_for_enum.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18995>
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