# Tk_rgb_brightness.py

# Tk_rgb_brightness.py

from Tkinter import *
from PIL import Image, ImageTk
from math import *
import random
import re

colors = 4096*4096

w = h = 600

xyc = []
for y in range(0,h):
    for x in range(0,w):
        rgb = int((y*6.4)*4096+((x*6.4)%4096))
        r,g,b = (rgb & 0xff, (rgb >> 8) & 0xff, rgb >> 16)
        lum = sqrt(0.299*r + 0.587*g + 0.114*b)
        xyc.append([lum,(r,g,b)])
xyc.sort(key=lambda z: z[0])
root = Tk()
root.title("Tk rgb brightness")
canvas = Canvas(root, width=w, height=h)
canvas.pack()
for y in range(0,h):
    zzz,xyc = xyc[:w],xyc[w:]
    # zzz.sort(key=lambda z: z[1][1]+z[1][2])
    for x in range(0,w):
        z,cx = zzz.pop()
        canvas.create_line((x,y,x+1,y+1),fill='#%02x%02x%02x' % cx)
    root.update()
0
root.mainloop()