Python's IDLE library (idlelib) has different package names in Python 2.x and 3.x

[mikefenton]

The GUI uses exception handling to try to import Tkinter, as the module can be named Tkinter or tkinter. A similar check should be implemented for the idlelib imports as a few things seem to have changed in the most recent versions of idlelib.

In Python 2.x, all module names are correct as currently implemented in the GUI:

from idlelib.Percolator import Percolator
from idlelib.ColorDelegator import ColorDelegator
from idlelib.textView import view_file

However, in Python 3.x some changes have been made. Module names are no longer capitalised, and the idlelib.ColorDelegator module has been re-named. An alternative implementation similar to the tkinter case above should be:

from idlelib.percolator import Percolator
from idlelib.colorizer import ColorDelegator
from idlelib.textview import view_file

All of the above means that the GUI does not run any more in Python 3.x.