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- def multiply_matrix(m1, m2):
- if len(m1[0]) != len(m2):
- return "ERROR"
- res = []
- for i in range(len(m1)):
- res.append([])
- for j in range(len(m2[0])):
- m2_col = [m2[x][j] for x in range(len(m2))]
- res[i].append(sum([x1 * x2 for x1, x2 in zip(m1[i], m2_col)]))
- return res
- print(multiply_matrix([[1, 2, 3]], [[1], [2], [3]]))
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