Python list function argument names [duplicate]

Use the inspect module from Python’s standard library (the cleanest, most solid way to perform introspection).

Specifically, inspect.getargspec(f) returns the names and default values of f‘s arguments — if you only want the names and don’t care about special forms *a, **k,

import inspect

def magical_way(f):
    return inspect.getargspec(f)[0]

completely meets your expressed requirements.