L3·Functions & Modules

✨*args & **kwargs

Variable-length positional and keyword arguments.

*args**kwargsunpacking

§ 1Star params

*args collects extra positional args into a tuple. **kwargs collects extra keyword args into a dict.

§ 2Unpacking at call site

f(*iter, **mapping) spreads them into arguments.

§ 3Keyword-only

def f(a, *, b): b must be passed by keyword.

Example

1def show(*args, **kwargs):
2    print("pos:", args)
3    print("kw:", kwargs)
4
5show(1, 2, 3, name="Ada", age=36)
6
7nums = [1, 2, 3]
8show(*nums, mode="debug")

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*args is a:

Defining Functions

Lambdas & Higher-Order Functions