New submission from Jonathan Ellington: Attempting to use class that has both __exit__() and __enter__() undefined as a context manager yields an AttributeError referring to __exit__:
>>> class A(): ... pass ... >>> with A(): ... pass ... Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: A instance has no attribute '__exit__' Knowing that the 'with' statement should first execute __enter__, this is unexpected. The patch ensures the attribute error refers to __enter__() when both methods are undefined. ---------- components: Interpreter Core files: with.patch keywords: patch messages: 266219 nosy: ellingtonjp, rhettinger priority: normal severity: normal status: open title: Attempting to use class with both __enter__ & __exit__ undefined yields __exit__ attribute error type: behavior Added file: http://bugs.python.org/file42962/with.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27100> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
