re: What's the use of if __name__ == '__main__': in Python? VIEW POST


Quite simply stated, if you are importing code from another module—and that module contains the code snippet

if __name__==‘__main__’: #code goes here

—if you execute your (first) program/script, all of the code from that other (second) module/program/script, minus/without the code in that particular

if __name__==‘__main__’: #code goes here

section, will be parsed and executed.

To further clarify, all of the code in the other/second program’s

if __name__==‘__main__’: #code goes here

section (from that first line of that section, parsing downwards) shall not be “seen”/executed when executing the first program.

Ergo, it is primarily utilized for testing- or debugging-based purposes specifically involving code imports/importing, as above-mentioned.

However, note this: if you execute that second program’s code/the second program itself, all of the code inside that second program—including its

if __name__==‘__main__’: #code goes here

section—will, indeed, be “seen,” or executed. Such an example would be a “print” statement, such as print(“Neat-o”).

That was a fantastic question—I hope my explanation clarifies it for you! 😊

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