> [Guido van Rossum] > > Marcin 'Qrczak' Kowalczyk <qrczak at knm.org.pl> writes: > > > > Now thow in 'isinstance' as an old way to spell a specific membership > > > test (for types and classes) which doesn't have to be learned about > > > at all. > > > I love it. 'x in type' as a shorthand for isinstance(x, type). > > Checked into CVS! > > The above exchange is dated 2001-07-31, and I'm merely glancing over > some old saved email. The above feature does not seem to be implemented > in Python 2.3.2, as demonstrated by the script below. Has it been > retracted? Not that I really need it, however! :-) Yes, it was retracted. From the CVS log the next day: ---------------------------- revision 2.16.8.73 date: 2001/08/01 03:56:39; author: gvanrossum; state: Exp; lines: +1 -21 Rip out again the 'x in type' support. Further newsgroup discussion showed it was confusing. E.g. people tried "if x in [int, long]: ...". ---------------------------- In retrospect I think it was too cute... --Guido van Rossum (home page: http://www.python.org/~guido/)
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