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Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to

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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.
This commit is contained in:
Antoine Pitrou 2008-08-26 22:40:48 +00:00
parent e2dffc0aeb
commit ec569b7947
8 changed files with 202 additions and 97 deletions
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16
Lib/test/test_exceptions.py
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@ -582,12 +582,18 @@ class ExceptionTests(unittest.TestCase):
except KeyError:
pass
except:
self.fail("Should have raised TypeError")
self.fail("Should have raised KeyError")
else:
self.fail("Should have raised TypeError")
self.assertEqual(stderr.getvalue(),
"Exception ValueError: ValueError() "
"in <class 'KeyError'> ignored\n")
self.fail("Should have raised KeyError")
def g():
try:
return g()
except RuntimeError:
return sys.exc_info()
e, v, tb = g()
self.assert_(isinstance(v, RuntimeError), type(v))
self.assert_("maximum recursion depth exceeded" in str(v), str(v))
def test_MemoryError(self):