[PyKDE] MVC Question

[M.Chambers]

Hi everyone, thanks for your past advice.  I have a abstract model and a
qtreeview setup to use an cElementTree object as the underlying data
source.  Works awesome, and its very fast.  What happens when I want to
replace the elelentreee object with a newer one which may or may not
contain new data?  For a split second I would be ripping the data out
from under the model.  Is there any methods I have to call to prepare it
for this?