Questions about __name__

[scidam]

This line is used to distinguish execution behavior when the file is imported as a module, or is executed as a script. When it is executed as a script builtin variable __name__ is set to __main__, when the file is imported as a module __name__ is set to filename.

Let we have myfile.py with that construction. When you call this file e.g. python myfile.py the code under if-statement will be executed. If you import the file as a module, e.g. put somewhere import myfile, the code under if-statement wouldn't be executed.