Add two matrices in python

Question

I\'m trying to write a function that adds two matrices to pass the following doctests:

  >>> a = [[1, 2], [3, 4]]
  >>> b = [[2, 2], [2, 2]         


        

Answer 1

One more solution:

map(lambda i: map(lambda x,y: x + y, matr_a[i], matr_b[i]), xrange(len(matr_a)))