Antoine Pitrou added the comment: Antony, if you write (line numbers added for clarity):
1. try: 2. d[obj] 3. except KeyError: 4. d[obj] = some new value... 5. # expect d[obj] to exist at this point it is possible that d[obj] still exists at line 2 but not anymore at line 5 (because there would have been a garbage collection run in-between), at least if the original key is not `obj` but some other object equal to `obj`. Using setdefault() would ensure that doesn't happen. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue31254> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
