Python IDLE is not starting on Windows 7

Question

I used to use Python 2.7 and then IDLE was working. I uninstalled it and installed Python 3.1.
Right now Idle cannot launch. What should i do to get it running?

NOTE

Answer 1

Run python setup program, change python 2x, choose to entirely remove tcl/tk, proceed, then run setup again, change python again, on the tcl\tk choose entire feature will be installed, proceed.

It worked for me.