Generate Array – Python 3

Generate Array:

AB = [0] * m = [0 for i in range(m)] = [0, 0, 0]

AB = [[0] * m] = [[0, 0, 0]]

AB = [[0] for i in range(m)] = [[0], [0], [0]]

AB = [[0] * m for i in range(n)] = [[0, 0, 0], [0, 0, 0]]