[Python-Dev] PyDict_Get/SetItem and dict subclasses (original) (raw)

Antoine Pitrou solipsis at pitrou.net
Sun Nov 6 17:39:02 CET 2011

Le 05/11/2011 17:34, Éric Araujo a écrit :

Hi Victor,

PyDictGetItem() and PyDictSetItem() don't call getitem and setitem for dict subclasses. Is there a reason for that? http://bugs.python.org/issue10977 “Currently, the concrete object C API bypasses any methods defined on subclasses of builtin types.”

I think that's the correct behaviour. If you expect to get an arbitrary mapping, just use the abstract API. You should use PyDict_GetItem when you know the object is exactly a dict (generally because you have created it yourself, or you know at least where and how it was created).

Regards

Antoine.

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