On Apr 8, 2007, at 7:26 PM, Alex DeCaria wrote:

> Thanks Morton - That's what I needed to know.

As you can see from the posting by NAGAI san, there is lot more to  
TkVariable than what I had worked out. Most important, of course, is  
that I wasn't aware that one _can_ have the behavior that you asked  
for if by making use TkVariable#default_value_type=.

Regards, Morton