[Python-Dev] Re: 2.2 features (original) (raw)
François Pinard pinard at iro.umontreal.ca
Mon Jan 19 18:36:57 EST 2004
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[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 Has it been retracted?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! :-)
Python 2.3.2 (#1, Nov 9 2003, 20:14:22) [GCC 3.3 20030226 (prerelease) (SuSE Linux)] on linux2 Type "help", "copyright", "credits" or "license" for more information. from future import nested_scopes, generators, division del future, fcntl, termios, joined, character, nested_scopes, generators, division sys.ps1 = '>>> ' from future import nested_scopes, generators, division del future, fcntl, termios, joined, character, nested_scopes, generators, division sys.ps1 = '>>> '
0 in int Traceback (most recent call last): File "", line 1, in ? TypeError: iterable argument required isinstance(0, int) True int <type 'int'>
-- François Pinard http://www.iro.umontreal.ca/~pinard
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