def mapper(matrix1, matrix2):
    
    for i in xrange(0, len(matrix1)):
        for j in xrange(0, len(matrix2[0])):
            
            key = (i, j)
            val1 = matrix1[i]
            val2 = [row[j] for row in matrix2]
            
            mapReducer.emitIntermediate(key, val1)
            mapReducer.emitIntermediate(key, val2)

def reducer(key, list_of_values):

    m1, m2 = list_of_values
    val1, val2 = key
    val3 = sum([m1[i] * m2[i] for i in xrange(0, len(m1))])
    
    mapReducer.emit([val1, val2, val3])