Is there a way to check a function's signature in Python?

Question

I\'m looking for a way to check the number of arguments that a given function takes in Python. The purpose is to achieve a more robust method of patching my classes for tests.

Answer 1

You can use:

import inspect
len(inspect.getargspec(foo_func)[0])

This won't acknowledge variable-length parameters, like:

def foo(a, b, *args, **kwargs):
    pass