unpacking

def sumar(a,b,c,d):
    return a+b+c+d

n = [1,2,3,4]
dicc = {"a":1, "b":2, "c":3, "d":4}

# FORMA HORRIBLE
print(sumar(n[0], n[1], n[2], n[3]))

# unpacking
a,b,c,d = n
print(sumar(a,b,c,d))

# agrupamiento/desagrupamiento
print(sumar(*n))
print(sumar(**dicc))