By: Python Team in Python Tutorials on 2012-04-07
A module can find out its own module name by looking at the predefined global variable __name__. If this has the value '__main__', the program is running as a script. Many modules that are usually used by importing them also provide a command-line interface or a self-test, and only execute this code after checking __name__:
def main(): print('Running test...') ... if __name__ == '__main__': main()
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