https://dev.to/lodyne/first-class-function-in-python-snake-4hi5
First-Class Function in Python - DEV Community
Everything in Python is an Object (You heard it here first). Just kidding! Of course, at it's core... Tagged with programming, python, codenewbie, beginners.
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https://en.wikipedia.org/wiki/First-class_functions
First-class function - Wikipedia
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