Is there a way to clear Python's IDLE window?

The best way to do it on windows is using the command prompt 'cmd' and access the Python directory. The command prompt could be found on the start menu → Run → cmd.

C:
cd C:\Python27
python.exe

Output:

Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.

Session:

>>>import os
>>>os.system('cls')  #This will clear the screen and return the value 0