variable space..functions..tkinter

[jakecvb]

I've looked over this code too mutch, and even whent and read the main python tutorial again, and I can't understand why this code dosen't work.

The Python docs claim that declaring a variable at the beginning of a function, or class to a entrnal value or function is how you reference the external function, class, or value in that sector of variable space. Understanding that, and the rest of the tutorial I tryed to make reference to a external object/class only to find the script wouldn't even initialize.

Help will be greatly appreciated!

The code:

import Tkinter
from Tkconstants import *
from VideoCapture import Device

cam = Device()
cam.saveSnapshot('image.gif', timestamp=3, boldfont=1)

def snapper(canvas,tk,photo):
    p = cam
    p.saveSnapshot('image.gif', timestamp=3, boldfont=1)
    photo=Tkinter.PhotoImage(file='image.gif')
    canvas.create_image(200, 250, image=photo)
          
def window(tk):
    global photo
    frame=Tkinter.Frame(tk,background='#333333')
    frame.pack()
    canvas=Tkinter.Canvas(frame,width=400,height=400,background='black')
    canvas.pack()
    photo=Tkinter.PhotoImage(file='image.gif')
    canvas.create_image(200, 250, image=photo)
    button=Tkinter.Button(frame, text="Exit", width=10, height=1, command=tk.destroy)
    button.pack(side=LEFT,padx=5)
    button1=Tkinter.Button(frame, text="Connect", width=10, height=1, command=tk.destroy)
    button1.pack(side=LEFT,padx=5)
    button2=Tkinter.Button(frame, text="Disconnect", width=10, height=1, command=tk.destroy)
    button2.pack(side=LEFT,padx=5)
    button3=Tkinter.Button(frame, text="Refresh", width=10, height=1)
    button3.bind("<button-1>", snapper(canvas,tk,photo))
    button3.pack(side=LEFT,padx=5)



root = Tkinter.Tk()
window(root)
root.mainloop()