New submission from Ali Ramezani <ramezan...@gmail.com>:
In CLI (Command Line Interpreter): A tuple has a list component then try to += that component. Since tuple doesn't allow assignment then it raises error but actually does that. If you try actual equivalence (A=A+B) it does not. Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec 7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> >>> v=([1],[2]) >>> v[0]=v[0]+[3,4] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'tuple' object does not support item assignment >>> v ([1], [2]) >>> v[0]+=[3,4] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'tuple' object does not support item assignment >>> v ([1, 3, 4], [2]) >>> ---------- messages: 410861 nosy: ramezaniua priority: normal severity: normal status: open title: CLI: Addition assignment for tuples type: behavior versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue46423> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
