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Groups > comp.lang.python > #62175

Re: Type of an object:

From Gregory Ewing <greg.ewing@canterbury.ac.nz>
Newsgroups comp.lang.python
Subject Re: Type of an object:
Date 2013-12-17 23:35 +1300
Message-ID <bhann0F1rrsU1@mid.individual.net> (permalink)
References <mailman.4162.1387158693.18130.python-list@python.org> <52af7bfe$0$29976$c3e8da3$5496439d@news.astraweb.com> <mailman.4265.1387264469.18130.python-list@python.org> <52b0006a$0$29973$c3e8da3$5496439d@news.astraweb.com>

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Steven D'Aprano wrote:
> I think I need to see an actual working demonstration, because as far as 
> I can see, type(obj) returns obj.__class__.

Nope:

 >>> class C(object):
...  def f(self):
...   return "Surprise!"
...  __class__ = property(f)
...
 >>> c = C()
 >>> type(c)
<class '__main__.C'>
 >>> c.__class__
'Surprise!'

It appears that type() bypasses the attribute access
mechanism and goes straight for the actual type.

-- 
Greg

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Thread

Type of an object: ‘obj.__class__’ versus ‘type(obj)’ Ben Finney <ben+python@benfinney.id.au> - 2013-12-16 12:51 +1100
  Re: Type of an object: ‘obj.__class__’ versus ‘type(obj)’ Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-12-16 22:17 +0000
    Re: Type of an object: ‘obj.__class__’ versus ‘type(obj)’ dieter <dieter@handshake.de> - 2013-12-17 08:14 +0100
      Re: Type of an object: ‘obj.__class__’ versus ‘type(obj)’ Steven D'Aprano <steve@pearwood.info> - 2013-12-17 07:42 +0000
        Re: Type of an object: Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-12-17 23:35 +1300
          Re: Type of an object: Ethan Furman <ethan@stoneleaf.us> - 2013-12-17 06:50 -0800
          Re: Type of an object: Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-12-17 15:08 +0000
            Re: Type of an object: Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-12-18 11:15 +1300
              Re: Type of an object: Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-12-17 23:51 +0000
                Re: Type of an object: Ethan Furman <ethan@stoneleaf.us> - 2013-12-17 17:10 -0800
                Re: Type of an object: Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-12-19 00:45 +1300
                Re: Type of an object: Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-12-19 00:39 +1300

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