idle-python2.7 - blank window (after ubutu upgrade to 13.10)

[Jan Hapala]

Hi,

after upgrade of Ubuntu from 13.04 to 13.10, Idle for Python 2.7 has not been working any more:
1) When I choose to open an existing module, I get a blank window (as if the file was empty).
2) I cannot close the window. (No response to clicking on the button.)

When run in the terminal, I get:

problem 1:
==========

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1473, in __call__
    return self.func(*args)
  File "/usr/lib/python2.7/idlelib/EditorWindow.py", line 937, in open_recent_file
    self.io.open(editFile=fn_closure)
  File "/usr/lib/python2.7/idlelib/IOBinding.py", line 222, in open
    flist.open(filename)
  File "/usr/lib/python2.7/idlelib/FileList.py", line 36, in open
    return self.EditorWindow(self, filename, key)
  File "/usr/lib/python2.7/idlelib/PyShell.py", line 131, in __init__
    EditorWindow.__init__(self, *args)
  File "/usr/lib/python2.7/idlelib/EditorWindow.py", line 323, in __init__
    io.loadfile(filename)
  File "/usr/lib/python2.7/idlelib/IOBinding.py", line 258, in loadfile
    chars = self.decode(chars)
  File "/usr/lib/python2.7/idlelib/IOBinding.py", line 296, in decode
    enc = coding_spec(chars)
  File "/usr/lib/python2.7/idlelib/IOBinding.py", line 129, in coding_spec
    for line in lst:
NameError: global name 'lst' is not defined

problem 2:
==========

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1473, in __call__
    return self.func(*args)
  File "/usr/lib/python2.7/idlelib/EditorWindow.py", line 1025, in close
    self._close()
  File "/usr/lib/python2.7/idlelib/PyShell.py", line 302, in _close
    EditorWindow._close(self)
  File "/usr/lib/python2.7/idlelib/EditorWindow.py", line 1032, in _close
    self.unload_extensions()
  File "/usr/lib/python2.7/idlelib/EditorWindow.py", line 1053, in unload_extensions
    for ins in self.extensions.values():
AttributeError: 'PyShellEditorWindow' object has no attribute 'extensions'

Idle-python3.3 works fine.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Jan Hapala (jan-n)]

Solution here: http://ubuntuforums.org/showthread.php?t=2182753