I want to make it clear that calling the parameters args and kwargs is simply a naming convention. The previous example would work just as well if you called them *parms and **argv. The actual syntax is just the asterisk (*) or double asterisk (**), respectively.
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Besides its use as a temporary variable, “_” is a special variable in most Python REPLs that represents the result of the last expression evaluated by the interpreter.
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“double underscore” to “dunder.”
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single trailing underscore (postfix) is used by convention to avoid naming conflicts with Python keywords. This convention is defined and explained in PEP 8.
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Single underscores are a Python naming convention that indicates a name is meant for internal use. It is generally not enforced by the Python interpreter and is only meant as a hint to the programmer.
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single underscore prefix has a meaning by convention only.
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In Python, you can place a comma after every item in a list, dict, or set constant, including the last item