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Groups > comp.lang.python > #50441

Callable or not callable, that is the question!

From Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com>
Newsgroups comp.lang.python
Subject Callable or not callable, that is the question!
Date 2013-07-11 15:05 +0200
Message-ID <n6n2ba-ubg.ln1@satorlaser.homedns.org> (permalink)

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Hello!

I just stumbled over a case where Python (2.7 and 3.3 on MS Windows) 
fail to detect that an object is a function, using the callable() 
builtin function. Investigating, I found out that the object was indeed 
not callable, but in a way that was very unexpected to me:

     class X:
         @staticmethod
         def example():
             pass
         test1 = example
         test2 = [example,]

     X.example() # OK
     X.test1() # OK
     X.test2[0]() # TypeError: 'staticmethod' object is not callable


Bug or feature?


Thanks!

Uli

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Thread

Callable or not callable, that is the question! Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-07-11 15:05 +0200
  Re: Callable or not callable, that is the question! Peter Otten <__peter__@web.de> - 2013-07-11 16:11 +0200
    Re: Callable or not callable, that is the question! Ulrich Eckhardt <ulrich.eckhardt@dominolaser.com> - 2013-07-12 08:41 +0200
      Re: Callable or not callable, that is the question! Duncan Booth <duncan.booth@invalid.invalid> - 2013-07-12 07:36 +0000
        Re: Callable or not callable, that is the question! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-12 09:49 +0000
          Re: Callable or not callable, that is the question! Peter Otten <__peter__@web.de> - 2013-07-12 12:36 +0200
  Re: Callable or not callable, that is the question! Jason Swails <jason.swails@gmail.com> - 2013-07-11 10:28 -0400
  Re: Callable or not callable, that is the question! Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-12 02:12 +0000
    Re: Callable or not callable, that is the question! Ian Kelly <ian.g.kelly@gmail.com> - 2013-07-12 01:11 -0600

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