Message 62858 - Python tracker

➜

This issue tracker has been migrated to GitHub , and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

In-reply-to
Author	rhettinger
Recipients	belopolsky, benjamin.peterson, georg.brandl, loewis, rhettinger, vdupras
Date	2008年02月24日.00:51:25
SpamBayes Score	0.16962378
Marked as misclassified	No
Message-id	<1203814286.31.0.579047871922.issue2144@psf.upfronthosting.co.za>

Content
The builtins make direct calls to their own internal methods. This has existed for a long time. It would be hard to change without crushing performance. Changing it violates Meyer's open-closed principle. And changing it also introduces weird, unexpected behaviors (i.e. a seemingly innocent method override can break pickling for an object -- we had a bug report on this once for dicts and sets). Also, making these kind of changes makes it much harder for a builtin to guarantee that it invariants are maintained and opening the door for segfaults.

Content

The builtins make direct calls to their own internal methods. This has 
existed for a long time. It would be hard to change without crushing 
performance. Changing it violates Meyer's open-closed principle. And 
changing it also introduces weird, unexpected behaviors (i.e. a 
seemingly innocent method override can break pickling for an object -- 
we had a bug report on this once for dicts and sets). Also, making 
these kind of changes makes it *much* harder for a builtin to guarantee 
that it invariants are maintained and opening the door for segfaults.

History
Date	User	Action	Args
2008年02月24日 00:51:26	rhettinger	set	spambayes_score: 0.169624 -> 0.16962378 recipients: + rhettinger, loewis, georg.brandl, belopolsky, benjamin.peterson, vdupras
2008年02月24日 00:51:26	rhettinger	set	spambayes_score: 0.169624 -> 0.169624 messageid: <1203814286.31.0.579047871922.issue2144@psf.upfronthosting.co.za>
2008年02月24日 00:51:25	rhettinger	link	issue2144 messages
2008年02月24日 00:51:25	rhettinger	create

homepage