Mark Dickinson added the comment:
"Apparently True and 1 hash to the same item and False and 0 hash to the same
item"
Just to clear up a possible misconception here, the key point here is not that
they hash to the same integer, but that they're *equal*:
>>> True == 1
True
>>> False == 0
True
In contrast, here are two elements whose hash is equal but which serve as
distinct keys:
>>> hash(-1) == hash(-2)
True
>>> len({-1: -1, -2: -2})
2
IOW, dictionary semantics are defined in terms of equality, not hashing. The
hashing part should really be thought of as just a (somewhat exposed)
implementation detail.
----------
nosy: +mark.dickinson
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<http://bugs.python.org/issue26614>
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