[New-bugs-announce] [issue21993] counterintuitive behavior of list.index with boolean values

[Wolfgang Maier]

New submission from Wolfgang Maier:

>>> l = [False, True]
>>> l.index(True)
1
>>> l.index(False)
0

good, but:

>>> l = ['a', '', {}, 2.7, 1, 0, False, True]
>>> l.index(True)
4
>>> l.index(False)
5

Apparently, True and False get converted to int in comparisons to ints.
I would expect items to be compared either by:

a) object identity or
b) __eq__

but not this inconsistently.

Best,
Wolfgang

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components: Interpreter Core
messages: 223284
nosy: wolma
priority: normal
severity: normal
status: open
title: counterintuitive behavior of list.index with boolean values
type: behavior
versions: Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21993>
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