Change variable from shell

[GoogleCodeExporter]

Hello,

Thanks again for this great tool.  Is there a way to change a variable from a 
command shell.  It seems that the only way to update a variable is from std out 
of an input tag (from input file or command).  In my case, I have an input 
command for an entry widget that prevents all characters except numbers.  This 
gets run after key press action input.  I would also like to have another 
command that runs on focus-out which checks the entire string and updates it.  
I was thinking I could have another input command but that doesnt seem to work. 
 How can I update the variable from another shell command without using a file?

Thanks for any help,
John

Original issue reported on code.google.com by JMRichar...@gmail.com on 28 Jun 2013 at 6:03