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

My system is Win7/64 Enterprise edition and the Python version is 2.7.3 (I need this one...). This is what I got when I ran idle.py from the command window:

"
C:\Python27\Lib\idlelib>idle.py
Traceback (most recent call last):
  File "C:\Python27\Lib\idlelib\idle.py", line 11, in 
    idlelib.PyShell.main()
  File "C:\Python27\Lib\idlelib\PyShell.py", line 1406, in main
    root = Tk(className="Idle")
  File "C:\Python27\lib\lib-tk\Tkinter.py", line 1685, in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive, want
objects, useTk, sync, use)
_tkinter.TclError: Can't find a usable init.tcl in the following directories:
    {C:\Program Files (x86)\CSR\BlueSuite 2.5.0} C:/Python27/lib/tcl8.5 C:/lib/t
cl8.5 C:/lib/tcl8.5 C:/library C:/library C:/tcl8.5.2/library C:/tcl8.5.2/librar
y

This probably means that Tcl wasn't installed properly.
"

Indeed there was no "tcl8.5" folder in any of the listed above place but it was under: "C:\Python27\tcl".

When I copied it under "C:\Python27\lib" then IDLE started (with some other warnings but this seems related to my corp environment...)

In conclusion this looks like either an installer failing to copy the folder where it is supposed to or failing to set up some environment variables correctly or there's an actual bug int the release likely to show up on Win7/64 on certain edition(s). I am not a Python expert enough to debug Python itself, so please somebody take it from here...in the meantime I will see if the "workaround" is good enough :-)