[Tkinter-discuss] Tkinter question

[Fredrik Lundh]

Sorin Schwimmer wrote:

> Is it possible to have a widget id while it is created?

no, because the arguments to the constructor are evaluated *before* the 
constructor is called.

> Something like this:
> 
> Button(root, text='...', command= lambda v=<widget id>: fn(v)).grid()

use lexical scoping:

   b = Button(root, text='...', command=lambda: fn(b))
   b.grid()

or, if you're doing this in a loop:

   b = Button(root, text='...')
   b.config(command=lambda b=b: fn(b))
   b.grid()

</F>