New submission from Serhiy Storchaka <storchaka+cpyt...@gmail.com>:
Unlike other range()-like functions random.randrange() accepts not only
integers and integer-like objects (implementing __index__), but any numbers
with integral values, like 3.0 or Decimal(3). In 3.8 using __int__ for implicit
converting to C integers were deprecated, and likely will be forbidden in 3.9.
__index__ is now preferable.
I propose to deprecate accepting non-integer arguments in random.randrange()
and use __index__ instead of __int__ for converting values. At end it will lead
to simpler and faster code. Instead of
istart = _int(start)
if istart != start:
raise ValueError("non-integer arg 1 for randrange()")
we could use just
start = _index(start)
It will help also in converting the randrange() implementation to C.
See also issue37315.
----------
components: Library (Lib)
messages: 345892
nosy: mark.dickinson, rhettinger, serhiy.storchaka
priority: normal
severity: normal
status: open
title: Deprecate using random.randrange() with non-integers
type: enhancement
versions: Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue37319>
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