Convert image to c(++) formatted array

image2uint8arr.py

import numpy
from PIL import Image

image = Image.open("input.png")
arr = numpy.array(image)

output = "{"

for row in arr:
    for pixel in row:
        for color in pixel:
            output += str(color) + ", "
        output += "255, "
    output += "\n"
output += "}"

text_file = open("out.txt", "w")
text_file.write(output)
text_file.close()