If you use your own comparaison function (__eq__) for objects used as dict keys, you may now get RuntimeError with Python 3.3 if the dict is modified during a dict lookup in a multithreaded application. You should use a lock on the dict to avoid this exception.
Said differently, a dict lookup is not atomic if you use your own types as dict keys and these types implement __eq__. In Python < 3.3, the dict lookup is retried until the dict is no more modified during the lookup, which leads to a stack overflow crash if the dict is always modified. See the issue #14205 for the rationale. Victor _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
