You might not encounter them very often ... 10 * 2 = 20 I don't want to dwell on how all of this works, including inner functions and Python's scoping rules. I do, however, want to ask the question ...

Python's if __name__ == "__main__": construct enables a single Python file to not only support reusable code and functions, but also contain executable ... What does the Python 'if name equals main' ...