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v0.5.1
https://github.com/python/cpython
09 December 2020, 11:06:31 UTC
Revision c0afb7fa0ebd1c0e95c0760bbe75a99a8dd12ea6 authored by Matti Picus on 07 December 2020, 17:33:20 UTC, committed by GitHub on 07 December 2020, 17:33:20 UTC 
bpo-39825: Fixes sysconfig.get_config_var('EXT_SUFFIX') on Windows to match distutils (GH-22088)
 
 
 
 
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 Tip revision:  c0afb7fa0ebd1c0e95c0760bbe75a99a8dd12ea6  authored by  Matti Picus  on 07 December 2020, 17:33:20 UTC 
 bpo-39825: Fixes sysconfig.get_config_var('EXT_SUFFIX') on Windows to match distutils (GH-22088) 
 
 
 
 
  
 Tip revision:  c0afb7f  
 
 
 
 
 __main__.rst 
 
 
 

:mod:`__main__` --- Top-level script environment
================================================

.. module:: __main__
   :synopsis: The environment where the top-level script is run.

--------------

``'__main__'`` is the name of the scope in which top-level code executes.
A module's __name__ is set equal to ``'__main__'`` when read from
standard input, a script, or from an interactive prompt.

A module can discover whether or not it is running in the main scope by
checking its own ``__name__``, which allows a common idiom for conditionally
executing code in a module when it is run as a script or with ``python
-m`` but not when it is imported::

   if __name__ == "__main__":
       # execute only if run as a script
       main()

For a package, the same effect can be achieved by including a
``__main__.py`` module, the contents of which will be executed when the
module is run with ``-m``.

 
 
 
  
 
   
 
   
 
 
     
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