import numpy as np

r = np.array([
    [1, 2, 3, 4],
    [5, 6, 7, 8],
])
g = np.array([
    ['a', 'b', 'c', 'd'],
    ['e', 'f', 'g', 'h'],
])
b = np.array([
    ['A', 'B', 'C', 'D'],
    ['E', 'F', 'G', 'H'],
])

# složme 3 2D-pole do jednoho 3D-pole
rgb_1 = np.stack((r, g, b), axis=0)
rgb_2 = np.stack((r, g, b), axis=1)
rgb_3 = np.stack((r, g, b), axis=2)

# vzhled a vlastnosti polí
print('\n\n rgb_1:')
print(rgb_1)
print(rgb_1.shape, rgb_1.ndim)

print('\n\n rgb_2:')
print(rgb_2)
print(rgb_2.shape, rgb_2.ndim)

print('\n\n rgb_3:')
print(rgb_3)
print(rgb_3.shape, rgb_3.ndim)