Running idle from a terminal window in desktop. 

Python 2.5.1 (r251:54863, Nov 22 2007, 13:55:16) 
[GCC 4.1.2] on linux2
Type "copyright", "credits" or "license()" for more information.

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IDLE 1.2.1      
>>> import sys
>>> test = sys.    <--- pressing tab should give you the available
options for that module/library.

The error in the console is as follows:

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1403, in __call__
    return self.func(*args)
  File "/usr/lib/python2.5/idlelib/AutoCompleteWindow.py", line 217, in
winconfig_event
    x, y, cx, cy = self.widget.bbox(self.startindex)
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 2833, in bbox
    self.tk.call((self._w, 'bbox') + args)) or None
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1030, in _getints
    return tuple(map(getint, self.tk.splitlist(string)))
ValueError: invalid literal for int() with base 10: '(128,'
Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1403, in __call__
    return self.func(*args)
  File "/usr/lib/python2.5/idlelib/AutoCompleteWindow.py", line 217, in
winconfig_event
    x, y, cx, cy = self.widget.bbox(self.startindex)
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 2833, in bbox
    self.tk.call((self._w, 'bbox') + args)) or None
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1030, in _getints
    return tuple(map(getint, self.tk.splitlist(string)))
ValueError: invalid literal for int() with base 10: '(128,'
Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1403, in __call__
    return self.func(*args)
  File "/usr/lib/python2.5/idlelib/AutoCompleteWindow.py", line 217, in
winconfig_event
    x, y, cx, cy = self.widget.bbox(self.startindex)
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 2833, in bbox
    self.tk.call((self._w, 'bbox') + args)) or None
  File "/usr/lib/python2.5/lib-tk/Tkinter.py", line 1030, in _getints
    return tuple(map(getint, self.tk.splitlist(string)))
ValueError: invalid literal for int() with base 10: '(128,'