introspect c-functions?

[holger krekel]

Hello, 

is there any way to introspect the *number of arguments*
of a function implemented at c-level? the inspect 
module works only on python-functions, seemingly.

>>> import inspect
>>> inspect.getargspec(filter)
------------------------------------------------------------
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.3/inspect.py", line 621, in getargspec
    if not isfunction(func): raise TypeError, 'arg is not a Python
function'
TypeError: arg is not a Python function
>>>

Any input and comments appreciated. 

    holger