# Tk_askopenfilename_ImageTk.py

# Tk_askopenfilename_ImageTk.py # if... image "pyimage1" doesn't exist ???

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

root = Tk()
root.title("Tk_askopenfilename_ImageTk")
ww = 1400
hh = 720
root.geometry("%dx%d+-10+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.pack()

ppp = '0 64 128 192 255'.split()
from tkFileDialog import askopenfilename
img_data = askopenfilename(filetypes=[('png files', '.png')]) # needs to be placed after pack()

image = Image.open(img_data)
imw,imh = image.size
img = Image.new('RGB', (imw,imh))
rgb = image.convert("RGB")
sss = list(rgb.getdata())
ttt = set(sss)
sss = str(sss)
'''
for t in ttt:
    rgb = '(%s, %s, %s)'%tuple([ppp[z/52] for z in t])
    sss = sss.replace(str(t),str(rgb))
'''
sss = eval(sss)

img.putdata(sss)
imgTk = ImageTk.PhotoImage(img)
canvas.create_image(10, 10, anchor=NW, image=imgTk)
root.update()