Python method/function arguments starting with asterisk and dual asterisk [duplicate]

The *args and **keywordargs forms are used for passing lists of arguments and dictionaries of arguments, respectively. So if I had a function like this:

def printlist(*args):
    for x in args:
        print(x)

I could call it like this:

printlist(1, 2, 3, 4, 5)  # or as many more arguments as I'd like

For this

def printdict(**kwargs):
    print(repr(kwargs))

printdict(john=10, jill=12, david=15)

*args behaves like a list, and **keywordargs behaves like a dictionary, but you don’t have to explicitly pass a list or a dict to the function.

See this for more examples.