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Python Conditional Check

9,780 Points

We use this conditional check everytime??

So that means, in all files that I import, I should always add this conditional check for ALL the code except the code that is not in a function or class definition??

I mean you always want to call imported functions and access imported classes individually when you need them in your main.py or not?? This gets me really confused.

1 Answer

Chris Freeman
Chris Freeman
Treehouse Moderator 68,166 Points

You will want to use the conditional check

if __name__ == __main__:

to isolate code that you wish to run only if this module is the topmost module executed. Code protected by this conditional will not run if the module is imported into another module.

Many library modules do not have this conditional check since they’re never intended to be run directly as the topmost module.

Post back if you need more help. Good luck!!!