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Yoon Choi
Yoon Choi
1,649 Points

Why don't you have an explanation for dunder name and dunder main?

Can we have a discussion on what name and main is?

1 Answer

Chris Freeman
Chris Freeman
Treehouse Moderator 67,989 Points

Good question! As answered here and here,

This is a common python idiom to detect if a module is imported or being executed directly.

When a python module is imported into another module, its __name__ attribute is set to be the same as the module name. When a python module is executed, the top level module attribute __name__ is changed to be "__main__". This way a module can tell the difference between if it is being imported or executed.

The python idiom

if __name__ == "__main__":

says, "if my __name__ attribute has been changed to the string "__main__", then execute the function main(). The "pass" would be replaced with the code to be executed.

Post back if you have more questions. Good luck!!