Python's favorite unexplained incantation: def main if __name__ == '__main__'. In this video I explain why your Python scripts should use this idiom. It's not strictly necessary, but you will be a better Python coder if you follow established conventions that improve the readability of your code.

― mCoding with James Murphy (https://mcoding.io)

Source code: https://github.com/mCodingLLC/VideosSampleCode
StackOverflow on the topic: https://stackoverflow.com/questions/419163/what-does-if-name-main-do
Python docs: https://docs.python.org/3/reference/toplevel_components.html#complete-python-programs

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CHAPTERS
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0:00 Intro
0:58 Dunder name
1:47 Why if name main
3:36 Why def main
4:59 Pickle example
5:42 Multiprocessing example
6:42 Main function entry point
7:07 Outro