Serhiy Storchaka added the comment: Later I had got a crash.
>>> class S(str): __slots__ = () ... >>> 'a'.__class__ = S >>> >>> def f(a): pass ... Fatal Python error: non-string found in code slot Current thread 0xb7583700 (most recent call first): Aborted (core dumped) The stdlib is full of implicit caches. Virtually any hashable object can be cached and shared. Why __class__ assignment is allowed at all? There are only two uses of __class__ assignment in the stdlib besides tests (in Lib/importlib/util.py and in Lib/xml/sax/saxutils.py), and in both cases it looks as optimization trick. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue24912> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
