New submission from Kodiologist <[email protected]>:
I'm not sure if this is a bug, but it certainly surprised me. Most reserved
words, when Unicode-mangled, as in "𝕕𝕖𝕗", act like ordinary identifiers (see
e.g. bpo-46520). `True`, `False`, and `None` are weird in that Unicode-mangled
versions of them refer to those same constants initially, but can take on their
own identity as variables if assigned to:
Python 3.9.7 (default, Sep 10 2021, 14:59:43)
[GCC 11.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 𝕋𝕣𝕦𝕖
True
>>> True = 0
File "<stdin>", line 1
True = 0
^
SyntaxError: cannot assign to True
>>> 𝕋𝕣𝕦𝕖 = 0
>>> True
True
>>> 𝕋𝕣𝕦𝕖
0
I think that `𝕋𝕣𝕦𝕖 = 1` should probably be forbidden. The fact that `𝕋𝕣𝕦𝕖`
doesn't always mean the same thing as `True` seems to break the rule in PEP
3131 that "comparison of identifiers is based on NFKC".
----------
messages: 411930
nosy: Kodiologist
priority: normal
severity: normal
status: open
title: Unicode-mangled names refer inconsistently to constants
type: behavior
versions: Python 3.9
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue46555>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
