Python list function argument names [duplicate]

Question

Is there a way to get the parameter names a function takes?

def foo(bar, buz):     pass  magical_way(foo) == ["bar", "buz"] 

Answer 1

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.

Answer 2

>>> import inspect >>> def foo(bar, buz): ...     pass ...  >>> inspect.getargspec(foo) ArgSpec(args=['bar', 'buz'], varargs=None, keywords=None, defaults=None) >>> def magical_way(func): ...     return inspect.getargspec(func).args ...  >>> magical_way(foo) ['bar', 'buz']