python3 if __name__ == __main__ code example

Example 1: python main

def main():
    print("Hello World!")

if __name__ == "__main__":
    main()

Example 2: __name__== __main__ in python

# If the python interpreter is running that module (the source file)
# as the main program, it sets the special __name__ variable to have
# a value “__main__”. If this file is being imported from another 
# module, __name__ will be set to the module’s name.
if __name__=='__main__':
  # do something

Example 3: python if name == main example

# It's as if the interpreter inserts this at the top
# of your module when run as the main program.
__name__ = "__main__"

Example 4: __name__ == '__main__'

if __name__ == "__main__": main()

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