hotbox:~$ ipython2.5 
Python 2.5.2 (r252:60911, Apr 24 2008, 00:22:29) 
Type "copyright", "credits" or "license" for more information.

IPython 0.8.2 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object'. ?object also works, ?? prints more.

In [1]: import sqlite3

In [2]: con=sqlite3.connect(":memory:")
---------------------------------------------------------------------------
SystemError                               Traceback (most recent call last)

/Users/pfein/<ipython console> in <module>()

SystemError: NULL result without error in PyObject_Call