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Author maker
Recipients abacabadabacaba, belopolsky, eric.smith, ezio.melotti, maker, mark.dickinson, r.david.murray, rhettinger, serhiy.storchaka, stutzbach
Date 2012-09-24.17:02:38
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1348506159.01.0.984834469804.issue8425@psf.upfronthosting.co.za>
In-reply-to
Content 
What do you mean by "does not preserve set identity"? Because I see: 

$ ./python.exe
Python 3.3.0rc2+ (default:178f9042af81+, Sep 24 2012, 18:54:31) 
[GCC 4.2.1 Compatible Apple Clang 2.1 (tags/Apple/clang-163.7.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> a = set(range(1))
[65967 refs]
>>> b = set(range(20))
[65989 refs]
>>> id(a)
4540421032
[65992 refs]
>>> a -= b
[65991 refs]
>>> id(a)
4540421032
History
Date User Action Args
2012-09-24 17:02:39makersetrecipients: + maker, rhettinger, mark.dickinson, belopolsky, eric.smith, stutzbach, ezio.melotti, r.david.murray, abacabadabacaba, serhiy.storchaka
2012-09-24 17:02:39makersetmessageid: <1348506159.01.0.984834469804.issue8425@psf.upfronthosting.co.za>
2012-09-24 17:02:38makerlinkissue8425 messages
2012-09-24 17:02:38makercreate