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Re: When I need classes?

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  Re: When I need classes? Cameron Simpson <cs@zip.com.au> - 2016-01-11 13:57 +1100
    Re: When I need classes? Ulli Horlacher <framstag@rus.uni-stuttgart.de> - 2016-01-11 07:31 +0000

#101456 — Re: When I need classes?

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>

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#101466

Cameron Simpson <cs@zip.com.au> wrote:

> 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))

I, as a Python beginner, came to the same solution!
It seems, it was a good idea :-)


-- 
Ullrich Horlacher              Server und Virtualisierung
Rechenzentrum IZUS/TIK         E-Mail: horlacher@tik.uni-stuttgart.de
Universitaet Stuttgart         Tel:    ++49-711-68565868
Allmandring 30a                Fax:    ++49-711-682357
70550 Stuttgart (Germany)      WWW:    http://www.tik.uni-stuttgart.de/

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