[issue7006] The replacement suggested for callable(x) in py3k is not equivalent

[Joe Amenta]

Joe Amenta <amentajo at msu.edu> added the comment:

One such weird corner case:

from collections import Callable
class Spam(object):
   def __call__(self):
      return self

can_of_spam = Spam()
print callable(can_of_spam) == isinstance(can_of_spam, Callable) # True
del Spam.__call__
can_of_spam.__call__ = lambda can: 'spam'
print callable(can_of_spam) == isinstance(can_of_spam, Callable) # False

Regardless, attached a patch for the new proposed semantics

----------
keywords: +patch
nosy: +joe.amenta
Added file: http://bugs.python.org/file15671/new_callable_semantics.patch

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