Python Tricks: The Book

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.

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.

“double underscore” to “dunder.”