二次元のリスト内包表記

a = [[(i, j) for j in range(3)] for i in range(5)]

print(a)

[[(0, 0), (0, 1), (0, 2)],
 [(1, 0), (1, 1), (1, 2)],
 [(2, 0), (2, 1), (2, 2)],
 [(3, 0), (3, 1), (3, 2)],
 [(4, 0), (4, 1), (4, 2)]]