Don't forget to check your integer type!

"""PIL/Pillow Image.fromarray() doesn't check your array value types!"""

from PIL import Image

import numpy as np

im = Image.new("RGB", (2, 1))

im.putpixel((0, 0), (255, 0, 0))

im.putpixel((1, 0), (0, 255, 0))

a = np.array(im)

print("Good shape:", a.shape, a)

print("See?")

Image.fromarray(a, "RGB").show()

a = np.array([[[255, 0, 0], [0, 255, 0]]])

print("Bad shape:", a.shape, a)

print("Where'd the green pixel go?")

Image.fromarray(a, "RGB").show()

a = np.uint8(a)

print("Fixed shape:", a.shape, a)

print("If the green pixel disappeared, you forgot to cast to uint8.")

Image.fromarray(a, "RGB").show()