Testing on run time how many parameters a function is expecting.

main.py

from inspect import getargspec;

import sys


class Consumer(object):
    def __init__(self, path, callback):
        print("Creating class..")
        self._path = path
        self._callback = callback

    def use(self):
        print("Using Class...")
        # Decide if use one or two parameters
        (myargs, varargs, keywords, defaults) = getargspec(self._callback)
        print(len(myargs))


def one_param(first):
        print(first)

def two_param(first,second):
        print("%s - %s" %(first, second))

if __name__ == '__main__':
    one_param("Testing func...")
    print("Using %s as Func.." % two_param)
    print("Using %s as Func.." % one_param)
    con = Consumer("/va/log/messages",two_param).use()