How do I pass variable length arguments to parameters of another function?

Question

How do I pass variable length arguments to parameters of another function?

def fun(a,b,c):
    #calculating
    pass

from inspect import signature

def example(*args):
    if len(args) >= len(signature(fun).parameters):
        fun(args); # how do i do this without modifying fun function
        return
    print("error")

Answer 1

Change fun(args) to fun(*args[:3]) . This takes only the first 3 elements of args and unpacks them.

Edit: As kindall writes in his answer, you should also parameterise numargs .

Answer 2

Use slicing to make sure you have the right number of parameters, then use unpacking to pass them as individual arguments.

def example(*args):
    numargs = len(signature(fun).parameters)
    if len(args) >= numargs:
        return fun(*args[:numargs])
    print("not enough arguments")