[issue21234] __contains__ and friends should check "is" for all elements first
Wolfgang Maier
report at bugs.python.org
Wed Apr 16 15:26:08 CEST 2014
Wolfgang Maier added the comment:
> l=[myObj() for x in range(10000)]
>
> now compare:
>
> >>> 1 in m # slowed down by myObj.__eq__
> False
>
> >>> any(e is 1 for e in m) # identity checks only
> False
oops, sorry for the inconsistency here.
the first line should read:
m = [myObj() for x in range(10000)]
for this to work, of course.
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<http://bugs.python.org/issue21234>
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