Re: How about some syntactic sugar for " name == 'main' "?

Date	2014-11-13 12:43 -0800
From	Ethan Furman <ethan@stoneleaf.us>
Subject	Re: How about some syntactic sugar for " __name__ == '__main__' "?
References	(1 earlier) <CAPM-O+yukMKq8m1Udcw23=kgPc6zvncfS1ohPcyme_4RXMTATg@mail.gmail.com> <CALvWhxuo8EB_FqkeUXe9nRj1CGFxrVtzw76afc21cB5=D4aZwg@mail.gmail.com> <CALwzid=i6vKUnQU1pfO3qs8H5u+_J4ff_XdkQUxt4ajN5JNYfQ@mail.gmail.com> <5464F958.4070404@stoneleaf.us> <CALwzid=uiDQrn7PSUrD=U-u-4shXexwCGb9bgCueYdtC0uEjeg@mail.gmail.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.15787.1415911400.18130.python-list@python.org> (permalink)

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On 11/13/2014 12:33 PM, Ian Kelly wrote:
> On Thu, Nov 13, 2014 at 11:32 AM, Ethan Furman <ethan@stoneleaf.us> wrote:
>> On 11/12/2014 01:51 PM, Ian Kelly wrote:
>>> 
>>> On Wed, Nov 12, 2014 at 2:33 PM, Chris Kaynor wrote:
>>>> 
>>>> A decorator is an interesting idea, and should be easy to implement (only lightly tested):
>>>> 
>>>> def main(func): if func.__module__ == "__main__": func() return func # The return could be omitted to block
>>>> the function from being manually called after import.
>>> 
>>> This calls it at the wrong time, though.  [...]
>> 
>> One decorator that won't call too early is atexit.register().
> 
> Nice. That feels like an abuse, though. The actual program won't be able to register its own atexit handlers,
> because the program will already be exiting, and other things decorated with atexit.register might actually be
> called before the main function.

It's definitely a niche use-case -- such as a cli-helper lib:  import said lib, and when it's decorators are used set
the atexit handler to call the lib's __main__ function, which checks that the module name of the decorated function is
'__main__', and if it is, run stuff!

Hmmm... hopefully that wasn't difficult to explain.  ;)

- --
~Ethan~
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Thread

How about some syntactic sugar for " __name__ == '__main__' "? John Ladasky <john_ladasky@sbcglobal.net> - 2014-11-12 13:02 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Joel Goldstick <joel.goldstick@gmail.com> - 2014-11-12 16:07 -0500
  Re: How about some syntactic sugar for " __name__ == '__main__' "? John Ladasky <john_ladasky@sbcglobal.net> - 2014-11-12 13:17 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ethan Furman <ethan@stoneleaf.us> - 2014-11-12 13:19 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Chris Kaynor <ckaynor@zindagigames.com> - 2014-11-12 13:33 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Marko Rauhamaa <marko@pacujo.net> - 2014-11-12 23:52 +0200
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 14:51 -0700
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Skip Montanaro <skip.montanaro@gmail.com> - 2014-11-12 15:55 -0600
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Chris Kaynor <ckaynor@zindagigames.com> - 2014-11-12 14:09 -0800
    Re: How about some syntactic sugar for " __name__ == '__main__' "? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-15 22:09 +1100
      Re: How about some syntactic sugar for " __name__ == '__main__' "? Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 13:54 +0200
      Re: How about some syntactic sugar for " __name__ == '__main__' "? Vito De Tullio <vito.detullio@gmail.com> - 2014-11-16 11:26 +0100
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 15:19 -0700
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Terry Reedy <tjreedy@udel.edu> - 2014-11-12 18:19 -0500
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Chris Angelico <rosuav@gmail.com> - 2014-11-13 10:26 +1100
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Terry Reedy <tjreedy@udel.edu> - 2014-11-12 19:35 -0500
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Chris Angelico <rosuav@gmail.com> - 2014-11-13 11:54 +1100
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ethan Furman <ethan@stoneleaf.us> - 2014-11-13 10:32 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-13 13:33 -0700
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ethan Furman <ethan@stoneleaf.us> - 2014-11-13 12:43 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Skip Montanaro <skip.montanaro@gmail.com> - 2014-11-13 14:44 -0600
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Skip Montanaro <skip.montanaro@gmail.com> - 2014-11-13 14:53 -0600
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-13 15:48 -0700
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-13 15:56 -0700
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-15 21:52 +1100
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Vito De Tullio <vito.detullio@gmail.com> - 2014-11-16 11:39 +0100
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-16 10:15 -0700
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ethan Furman <ethan@stoneleaf.us> - 2014-12-01 15:19 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ethan Furman <ethan@stoneleaf.us> - 2014-12-01 16:45 -0800
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Chris Angelico <rosuav@gmail.com> - 2014-12-02 12:15 +1100
  Re: How about some syntactic sugar for " __name__ == '__main__' "? Ethan Furman <ethan@stoneleaf.us> - 2014-12-02 02:17 -0800

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