Author rhettinger
Recipients Trundle, daniel.urban, eric.araujo, ncoghlan, pitrou, rhettinger
Date 2011-03-20.21:55:22
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Message-id <1300658123.02.0.849113821695.issue10977@psf.upfronthosting.co.za>
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I'm just pointing out a problem.  Lots of existing code uses the concrete API and that code can break subclasses of builtin types (possibly resulting in segfaults).

I don't really care what is done about it.  I'm just observing that the current design of the concrete API is incompatible with subclassing of built-in types.

A practical consequence is that I don't see how to write a fast, light C version of OrderedDict that would be safe from calls to PyDict_SetItem().  AFAICT, there is no mechanism for adding extra state to a built-in type and being able to guarantee even very simple invariants.
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Date User Action Args
2011-03-20 21:55:23rhettingersetrecipients: + rhettinger, ncoghlan, pitrou, eric.araujo, Trundle, daniel.urban
2011-03-20 21:55:23rhettingersetmessageid: <1300658123.02.0.849113821695.issue10977@psf.upfronthosting.co.za>
2011-03-20 21:55:22rhettingerlinkissue10977 messages
2011-03-20 21:55:22rhettingercreate