vector.py

#!/usr/bin/env python

def scalar(a, b):
    acc = 0
    for num in range(len(a)):
        acc += a[num] * b[num]
    return acc

def vectorial(a, b):
    c = [None] * 3
    c[0] = a[1] * b[2] - a[2] * b[1]
    c[1] = a[2] * b[0] - a[0] * b[2]
    c[2] = a[0] * b[1] - a[1] * b[0]
    return c

def readvector():
    read = raw_input()
    tokens = read.split(",")
    vector = []
    for token in tokens:
        vector.append(int(token))
    return vector

print "Kerem az elso vektort"
v1 = readvector()
print "Kerem a masodik vektort"
v2 = readvector()
if len(v1) == len(v2):
    print scalar(v1, v2)
    if len(v1) == 3:
        print vectorial(v1, v2)