Strange the name of the file is changed automaticaly

[sylas]

Hi all! I find very strange that the name of the file is changed automatically. What becomes the first name I gave to my file: about_main.py
I think buran is very well placed to answer this.

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#about_main.py def funct():     print("Value of __name__ is: ", __name__)     print('This statement is in main function')    def someFn():     print ('This function is not called under the main function')       someFn()    if __name__ == "__main__":     funct()             """                                               Output                                                          This function is not called under the main functon Value of __name__ is:  __main__                    This statement is in main function ******************************************************* People use __name__ to determine if the script is being imported or not. If it's equal to "__main__" then it's not an import. The idea being, you want to run your main method if and only if you're not being imported.   . *********** just to add to micseydel's answer. Given your sample code if you execute your script it will execute both functions (because of line 9 and line 11-12) if you import it in another script it will execute someFn (because of line 9) but will not execute the other one ******************************* yes, you can just call them. As to which is better - in my opinion it's better to get the habit of using if __name__ =='__main__': """

[buran]

It's not the name of the file. It's a name of the scope.

https://docs.python.org/3/library/__main__.html

'__main__' is the name of the scope in which top-level code executes. A module’s __name__ is set equal to '__main__' when read from standard input, a script, or from an interactive prompt.

foo.py

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import bar print(__name__) bar.bar()

bar.py

1 2	def bar():     print(__name__)

if you run foo.py the output would be

Output:
__main__
bar

[sylas]

Can I consider that the first time the interpreter executes my file, it considers my file as __main__, and executes what is after the "if __name__ == "__main__" statement.
But if this file is imported by a second file, it no more executes what is under "if __name__ == "__main__" ???

[buran]

Can I consider that the first time the interpreter executes my file, it considers my file as __main__, and executes what is after the "if __name__ == "__main__" statement.

not only the first time, but every time when you execute your file

But if this file is imported by a second file, it no more executes what is under "if __name__ == "__main__"

yes, that is correct.
Actually read one more time my answer that you quote in your first post