Need help with canvas widget in Tkinter please

[flounder]

I cannot seem to figure out how to add images to a canvas with python/Tkinter

I can do it with Tcl/Tk and Perl/Tk but not with python i have tried this but

it did not work at all. Here is the code i used

-----------CODE--------------

#!/usr/bin/python

from Tkinter import *

mw = Tk()
mw.title("Map Editor")
photo = PhotoImage(file="tile0.gif")

display = Canvas(mw, width=640, height=480).pack()

item = display.create_image(0, 0, anchor=NW, image=photo)

image = display.addImage
mainloop()

--------------END OF CODE---------------

when i run this it gives me this error

-----------ERROR MESSAGE--------------

Traceback (innermost last):
  File ".//test.py", line 11, in ?
    item = display.create_image(0, 0, anchor=NW, image=photo)
AttributeError: 'None' object has no attribute 'create_image'

-----------END OF ERROR---------------

can anyone show me how this should be done I have looked at the

documentation and can't figure it out

Thanks in advance

--
Flounder