Drawing Trees

[Salim Zayat]

This is totally an opinion question here.  If one were drawing trees in 
Tkinter, it would make sense to draw them on a Canvas, with CanvasTexts 
for all the nodes of the tree (assuming the nodes and leaves are words).  
So lets say you do something to the tree (delete a node, add a node, 
etc), is it efficient to just delete everything, and redraw everything 
from scratch.  That it what I currently do, and the lag for large trees 
is a bit of a pill.  Is there a better way to do this?  Can you like 
store those text widgets and just use them again?  

Thanks.

Salim