newbie, re: tkinter canvas

[Locash]

Steven,

Thanks for all your comments.

I now understand why "self.world.img = imgL" works in createWidgets,
but not createLife.

As far as this latest comment is concerned, I guess I was just
thinking too hard.

Thanks again.

locash  

Steven Taschuk <staschuk at telusplanet.net> wrote in message news:<mailman.1047096673.2829.python-list at python.org>...
> One more thing...
> 
> Quoth Locash:
>   [...]
> >     def createLife(self, event):
> >         
> >         imgL = PhotoImage(file='life.gif')
> >         
> >         x = int(((event.x + 5)/10))*10
> >         y = int(((event.y + 5)/10))*10
> >         
> >         for i in range (0, len(self.currentGen)):
> >             for j in range (0, len(self.currentGen[i])):
> >                 if x == (i*10) and y == (j*10):                     
> >                     self.world.create_image(x, y, image=imgL)
> >                     self.currentGen[i][j] = imgL                    
> >                 else: pass
> >         self.world.img = imgL                       
> 
> I find this loop puzzling.  Why not just do this?
> 
> 	x = int(((event.x + 5)/10))*10
> 	y = int(((event.y + 5)/10))*10
> 	try:
> 		self.currentGen[x/10][y/10] = imgL
> 		self.world.create_image(x, y, image=imgL)
> 	except IndexError:
> 		# x,y outside of generation
> 		pass