Numpy Tile

x = np.array([[1, 2],
              [3, 4]])
print(x)
print(x.shape)

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

x1 = np.tile(x, (1, 2))
print(x1)
print(x1.shape)

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