[Python] Image pixels np.tobytes

# ===========================================================================
# Generates binary representation of image pixels with some aditional
# formatting
#
# newFileBytes = [123, 3, 255, 0, 100]
# make file
# newFile = open("filename.txt", "wb")
# write to file
# for byte in newFileBytes:
#   newFile.write(byte.to_bytes(1, byteorder='big'))
# ===========================================================================

import time
import numpy as np
import PIL
from PIL import Image
# fileHuman = open("pcie_img_human.txt","w")
filePCIe = open("pcie_img.txt","w")

img_refs = []

#I = np.asarray(PIL.Image.open('test.jpg'))
#x = np.ones((224, 224, 3), dtype='u1')
img = Image.open("test.jpg")
img = img.convert('RGB')        # You need this if you work with PNG
pixels = img.load()             # create the pixel map

# Image dimensions
img_width   = img.size[0]
img_height  = img.size[1]

# nnzv = np.zeros(stick_num, dtype='u2')
# nnzv[0:stick_num] = 0x0003
# x = np.asarray(img, dtype='u1')

stick_num = 224*224
x = np.zeros(stick_num*8, dtype='u2')
for ix in range (0, img_width):
    for iy in range (0, img_height):
        stick_offset = (ix*img_height + iy)*8
        x[stick_offset] = 0xe000
        for j in range(3):
            x[stick_offset + j] = pixels[ix,iy][j]

x.tobytes()

filePCIe.write(x)
filePCIe.close()
# https://stackoverflow.com/questions/2269827/how-to-convert-an-int-to-a-hex-string
#    --------------->
#   |
#   |
#   |
#  \|/
# for y in range (0, img_height):
#   for x in range (0, img_width):
#       # Extend tuple
#       pixel = (pixels[x, y][0], pixels[x, y][1], pixels[x, y][2], 0)
#       # line = " ".join(["\\{:s} \\0x00   ".format(hex(c)) for c in pixel])
#       # Human readable
#       line = "\\0xe0\\0x00 \\0x00\\0x00 \\0x00\\0x00 \\0x00\\0x00     ||  "
#       line = line + " ".join(["\\0x{:02x} \\0x00  ".format(c) for c in pixel])
#       fileHuman.write(line + "\n")
#
#       # Binary for PCIe
#       line = "\\0xe0\\0x00\\0x00\\0x00\\0x00\\0x00\\0x00\\0x00"
#       line = line + "".join(["\\0x{:02x}\\0x00".format(c) for c in pixel])
#       filePCIe.write(line)
#
# fileHuman.close()
# filePCIe.close()