Louie Lu added the comment: Another way to reproduce this problem:
>>> import datetime >>> from collections import defaultdict as dd >>> d = dd(datetime.datetime.now) >>> d['foo'] Traceback (most recent call last): File "<stdin>", line 1, in <module> SystemError: <built-in method __missing__ of collections.defaultdict object at 0x7f072e55b3b8> returned NULL without setting an error This problem doesn't appear on Python 2.7, too. ---------- nosy: +louielu _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30473> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com