Matrix multiplication

mult.py

import operator

a = [[1, 2, 3], [4, 5, 6]]
b = [[1, 2], [3, 4], [5, 6]]

def sumprod(row, col):
    return sum(reduce(operator.mul, data) for data in zip(row, col))

r = map(lambda row: map(lambda col: sumprod(row, col), zip(*b)), a)

def summ(a, b):
  return str(a)+'+'+str(b)

def prodd(a):
  return str(a[0])+'*'+str(a[1])

rr = map(lambda row: map(lambda col: reduce(summ, map(prodd, zip(row,col))), zip(*b)), a)

def prm(m):
  for row in m:
    print row

prm(a)
print "----"
prm(b)
print "----"
prm(r)
print "----"
prm(rr)