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From: Cameron Simpson <cs@zip.com.au>
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Subject: Re: When I need classes?
Date: Mon, 11 Jan 2016 13:57:41 +1100
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On 10Jan2016 08:02, Michael Torrie <torriem@gmail.com> wrote:
>I can't speak to Flask or any other web development.  But for simple
>scripts, I'll start out with no classes.  Just functions as needed, and
>some main logic.  I always use the idiom:
>
>if __name__ == '__main__':
>    # do main logic here
>
>This way I can import functions defined in this script into another
>script later if I want.

I always structure this aspect as:

  ... at or near top of script ...

  def main(argv):
    ... do main logic here ...

  ... at bottom ...
  if __name__ == '__main__':
    sys.exit(main(sys.argv))

This has the benefits of (a) putting the main program at the top where it is 
easy to see/find and (b) avoiding accidently introduction of dependence on 
global variables - because verything is inside main() it has the same behaviour 
as any other function.

Cheers,
Cameron Simpson <cs@zip.com.au>