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8 Commits

Author SHA1 Message Date
Antoine Pitrou 0668c62677 Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to 
match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
mechanism. In the process, fix a bug where isinstance() and issubclass(),
when given a tuple of classes as second argument, were looking up
__instancecheck__ / __subclasscheck__ on the tuple rather than on each
type object.

Reviewed by Benjamin Peterson and Raymond Hettinger.
 2008-08-26 22:42:08 +00:00
Jeffrey Yasskin b9e15f7555 Make isinstance(OldstyleClass, NewstyleClass) return False instead of raising 
an exception. Issue reported by Joseph Armbruster.
 2008-03-17 16:31:21 +00:00
Christian Heimes 608c1d8e87 Since abc._Abstract was replaces by a new type flags the regression test suite fails. I've added a new function inspect.isabstract(). Is the mmethod fine or should I check if object is a instance of type or subclass of object, too? 2008-03-03 18:28:04 +00:00
Christian Heimes c5f05e45cf Patch #2167 from calvin: Remove unused imports 2008-02-23 17:40:11 +00:00
Jeffrey Yasskin 57bd60b465 Working on issue #1762: Brought 
./python.exe -m timeit -s 'from fractions import Fraction; f = Fraction(3, 2)' 'isinstance(3, Fraction); isinstance(f, Fraction)'
from 12.3 usec/loop to 3.44 usec/loop and
  ./python.exe -m timeit -s 'from fractions import Fraction' 'Fraction(3, 2)'
from 48.8 usec to 23.6 usec by avoiding genexps and sets in __instancecheck__
and inlining the common case from __subclasscheck__.
 2008-02-13 17:58:04 +00:00
Jeffrey Yasskin fd1c24518b Fix issue 1747: allow classic classes to be checked for being subclasses of 
ABCs.
 2008-01-07 06:09:40 +00:00
Guido van Rossum 64c06e327d Backport of _abccoll.py by Benjamin Arangueren, issue 1383. 
With some changes of my own thrown in (e.g. backport of r58107).
 2007-11-22 00:55:51 +00:00
Guido van Rossum b55911378f Patch # 1026 by Benjamin Aranguren (with Alex Martelli): 
Backport abc.py and isinstance/issubclass overloading to 2.6.

I had to backport test_typechecks.py myself, and make one small change
to abc.py to avoid duplicate work when x.__class__ and type(x) are the
same.
 2007-09-10 22:36:02 +00:00