Need help with Tkinter for dynamic # of objects

[Doug Hellmann]

It looks like you are trying to use a list to store the buttons after
they are created.  You need to create a list before you can insert
anything into it.  Try this:

	self.set_of_buttons = []
	for n in range(m):
	  self.set_of_buttons.append(Tkinter.Button(self))

Doug


Donald Parker wrote:
> 
> Apologies in advance .... I'm quite new to Python so I suspect my problem is
> quite simple and due to a basic misunderstanding ... nevertheless, some
> insight into that misunderstanding would be appreciated.
> 
> I'm trying to define a Frame class that can have a variable number of button
> widgets. Within the Frame class I've tried coding the constructor as
> 
> n=0
> while n < m :
>     self.set_of_buttons[n] = [Tkinter.Button(self)]
>     n+n+1
> 
> ...which results an exception for an attribute error for 'set_of_buttons'
> 
> I thought types and variables came into existence as a result of assignment,
> but I am clearly breaking a rule I do not understand here.
> 
> I would like to know:
> a) what rule I am breaking
> b) how to achieve my objective