Message 53784 - Python tracker

IDLE already provides quick block indenting, by 
selecting one or more lines and pressing Tab. So, it 
would make sense to have Shift+Tab to do the opposite 
work. While there's already Alt+[ (and Alt+] to indent), 
Shift+Tab is more intuitive, especially to those who are 
used to other Windows developer tools, like Visual 
Studio or TextPad.