python init main code example

Example 1: python main

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

if __name__ == "__main__":
    main()

Example 2: 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 3: explained if name main python

python foo.py

Example 4: __name__ == '__main__'

if __name__ == "__main__": main()