Is there any way in Python to assert properties of a function object? I'd like to say something like: "Given f is a function, assert f takes a keyword parameter called foo".
def example(foo=1):
pass
def g(f):
assert f.takes_argument("foo")
g(example)
Yes, I know Python has duck-typing and you wouldn't want to do this exact example above, but I have some weird requirement in a meta-class and it would be very handy.
