Python image display

PIL has a weaker way to display images since it calls xv and there is no interaction possible with the image window.

I found a neat code example with Tkinter and have modified that to get image ground truth.

import os, sys
import Image, ImageTk
import Tkinter

filename = "test.dat"
FILE = open(filename,"a")

def write_to_file(txt):
    FILE.write(txt)

def button_click_exit_mainloop (event):
    write_to_file('\t'+event.char)
    event.widget.quit() # this will cause mainloop to unblock.


root = Tkinter.Tk()
root.bind("", button_click_exit_mainloop)
root.geometry('+%d+%d' % (100,100))


dirlist = os.listdir('.')
old_label_image = None
for f in dirlist:
    try:
        image1 = Image.open(f)
        write_to_file(f)
        root.geometry('%dx%d' % (image1.size[0],image1.size[1]))
        tkpi = ImageTk.PhotoImage(image1)
        label_image = Tkinter.Label(root, image=tkpi)
        label_image.place(x=0,y=0,width=image1.size[0],height=image1.size[1])
        root.title(f)
        if old_label_image is not None:
            old_label_image.destroy()
        old_label_image = label_image
        root.mainloop() # wait until user clicks the window
    except Exception, e:
        pass
FILE.close()