How do i...write a function called addall that takes an unknown number of parameters

def GetValue():
    return int(input())

def AddAll(*args):
    sum = 0
    count_int = 0
    count_float = 0
    count_fun = 0
    count_arg = len(args)
    for i in args: # Counts amount of int/floats
        t = type(i)
        if t is int:
            count_int += 1
        elif t is float:
            count_float += 1
        elif callable(i):
            count_fun += 1
        else:
           print("error not allowed type " + t.__name__)

    if count_int > 0 and count_int != count_arg:
        print("error, not ALL int")
        return -1
    elif count_float > 0 and count_float != count_arg:
        print("error, not ALL int")
        return -1
    elif count_fun> 0 and count_fun != 1:
        print("error, just ONE function pointer allowed")
        return -1

    if count_fun == 0:
        for i in args: # Adds up all the values together
            if i in args:
                sum += (i)
    else:
        print("to do: handle the function pointer case")

    return sum