Changing image in label

[2rkil at my-deja.com]

Hi.

I'm totally new to, yet amazed by, Python. I'm
trying to
write a program which displays a portrait, asking
the
user who it is. After answering, the picture
should change
to another person, and so on.

Probably simple, but I'm new to event based
programming.
What happens is that the first picture disappears,
and just
the frame (the sizes) of the new one appears.

Here's the code:

#!/usr/bin/python
from Tkinter import *
import string
root = Tk()

def getquestion():
    return "gfx/torkil_grindstein.gif", "Who is
this?", "Torkil Grindstein"

def getquestion2():
    return "gfx/haakon_brugaard.gif", "But who is
this?", "Håkon Brugård"

def update(event):
    global photo_widget, question_widget
    photo, question, fasit = getquestion2()
    gif = PhotoImage(file=photo)
    photo_widget["image"] = gif
    question_widget["text"] = question

def main():
    global photo_widget, question_widget,
answer_widget
    photo, question, fasit = getquestion()

    gif = PhotoImage(file=photo)
    photo_widget = Label(root, relief=RAISED,
image = gif)
    photo_widget.pack()

    question_widget = Label(root, text = question)
    question_widget.pack()

    f = Frame(root)
    f.pack()

    answer_widget = Entry(f)
    answer_widget.bind("<Return>", update)
    answer_widget.pack(side=LEFT)

    answer_button = Button(f, text="Answer")
    answer_button.bind("<Button>", update)
    answer_button.pack(side=LEFT)

    root.mainloop()

if __name__ == "__main__":
    main()

-------
If I, however, put a bogus line at the end of
update(), the
program naturally crashes, but then the correct
image is
shown!

Hope anyone can spot my incompetance...

Torkil


Sent via Deja.com http://www.deja.com/
Before you buy.