if __name__ == '__main__': is a common Python idiom used to check whether the current module is being run as the main program or if it is being imported as a module into another program.
When a Python module is run directly, its
__name__ attribute is set to
'__main__'. On the other hand, if the module is imported into another program, its
__name__ attribute is set to the name of the module.
if __name__ == '__main__':, you can specify certain codes to run only when the module is run directly as the main program and not when it is imported as a module.
Here’s an example to illustrate the usage:
def some_function(): # Code for the function def main(): # Code for the main program if __name__ == '__main__': main()
In this example, if the module is run directly, the
main() function will be executed. However, if the module is imported into another program, the
main() function will not be automatically executed. This allows the module to be used as a library of functions that can be imported and used by other programs without executing the main program logic.