Re: AttributeError: 'module' object has no attribute 'fork'

References	(2 earlier) <roy-496ACC.07490507082014@news.panix.com> <53e3afd9$0$29970$c3e8da3$5496439d@news.astraweb.com> <f865db66-8cb8-4796-a8f0-bedfb2ef5079@googlegroups.com> <53e464a3$0$30003$c3e8da3$5496439d@news.astraweb.com> <ca10fd68-16c7-45dc-b281-8a84e83d0b23@googlegroups.com>
Date	2014-08-08 17:32 +1000
Subject	Re: AttributeError: 'module' object has no attribute 'fork'
From	Chris Angelico <rosuav@gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.12741.1407483183.18130.python-list@python.org> (permalink)

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On Fri, Aug 8, 2014 at 5:17 PM, Rustom Mody <rustompmody@gmail.com> wrote:
>> But with Roy's suggestion, testing for the existence of os.fork is not
>> sufficient, because it will exist even on platforms where fork doesn't
>> exist. So testing that os.fork exists is not sufficient to tell whether or
>> not you can actually fork.
>
> Windows:
>
> Python 2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)] on win32
> Type "copyright", "credits" or "license()" for more information.
>>>> import os
>>>> os.fork
>
> Traceback (most recent call last):
>   File "<pyshell#1>", line 1, in <module>
>     os.fork
> AttributeError: 'module' object has no attribute 'fork'
>
>
> Linux:
>
> $ python
> Python 2.7.8 (default, Jul  4 2014, 13:08:34)
> [GCC 4.9.0] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import os
>>>> os.fork
> <built-in function fork>
>>>>
>
>
> So yes, I continue to miss something...

I think the bit you're missing is the "with Roy's suggestion" bit, at
which os.fork() would be callable and would raise a different error.

It's of course possible for fork() to fail (no memory, ulimit hit, etc
etc etc), but I would expect that the presence of os.fork should
correspond perfectly to the API's availability (at least as detected
by Python's compilation testing).

ChrisA

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AttributeError: 'module' object has no attribute 'fork' Satish ML <satishmlwizpro@gmail.com> - 2014-08-06 23:44 -0700
  Re: AttributeError: 'module' object has no attribute 'fork' Peter Otten <__peter__@web.de> - 2014-08-07 09:00 +0200
    Re: AttributeError: 'module' object has no attribute 'fork' Roy Smith <roy@panix.com> - 2014-08-07 07:49 -0400
      Re: AttributeError: 'module' object has no attribute 'fork' Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-08-08 02:56 +1000
        Re: AttributeError: 'module' object has no attribute 'fork' Rustom Mody <rustompmody@gmail.com> - 2014-08-07 22:19 -0700
          Re: AttributeError: 'module' object has no attribute 'fork' Rustom Mody <rustompmody@gmail.com> - 2014-08-07 22:35 -0700
          Re: AttributeError: 'module' object has no attribute 'fork' Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-08-08 15:48 +1000
            Re: AttributeError: 'module' object has no attribute 'fork' Rustom Mody <rustompmody@gmail.com> - 2014-08-08 00:17 -0700
              Re: AttributeError: 'module' object has no attribute 'fork' Chris Angelico <rosuav@gmail.com> - 2014-08-08 17:32 +1000

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