Jim Jeon <jimjeon...@gmail.com> added the comment:
Thank you all for the kind answers. I didn't know copying could cause so many problems. @veky Thank you for the example. But it seems that the example will actually raise and I think it should. I am talking f.assert_called_with(b) when `b` has same values of `a` before it is mutated. I thought the function's purpose is to check values of the exact moment the function is called. @xtreak Thanks for the related issue. I didn't consider `identity comparison` situations. Definitely that could cause problems. @mariocj89 > copy does not fully capture "the value of the object when it was passed" for > custom types. Thank you for the kind answer, it was really helpful to me. Now I understand why copying is so dangerous. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38346> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
