Consider two separate files File1 and File2.
"File2 __name__ =% s"
" __ main__ "
"File2 is being run directly"
" File2 is being imported "
Now the interpreter is given the command to run File1.py. python File1.py Output: File1 __name__ = __main__ File1 is being run directly And then File2.py is run. python File2.py Output: File1 __name__ = File1 File1 is being imported File2 __name__ = __main__ File2 is being run directly
As shown above, when File1.py is run directly, the interpreter installs the __name__ variable as __main__, and when it is run through File2.py by import, the __name__ variable is set as the name of the python script i.e. File1. Thus, we can say that if __name__ == "__main__" — it is the part of the program that is run when the script is run from the command line with a command such as python File1.py.
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