Terry J. Reedy <tjre...@udel.edu> added the comment:
With Tim's addition
>>> from fractions import Fraction as F
>>> from decimal import Decimal as D
>>> s = {0, 1, 0.0, 1.0, F(0,1), F(1, 1), D(0), D(1), False, True}
>>> s
{0, 1}
I think we should consider moving the main discussion of the general comparison
and hashing principle and example to the set entry. (Sets ars simpler and are
when people new to Python already know about.) Point out that for displays, the
first of equals is kept and not replaced (this is also true of dicts). Then,
in the dict entry, say that dict keys are treated like set items, give an
equivalent dict example, and link to the discussion of set items.
>>> x = None
>>> d = {0:x, 1:x, 0.0:x, 1.0:x, F(0,1):x, F(1, 1):x, D(0):x, D(1):x, False:x,
>>> True:x}
>>> d
{0: None, 1: None}
>>>
----------
title: False/True as dictionary keys treated as integers -> Better document
mixed-type comparison of set items, dict keys
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33572>
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