How to except the unexpected?

[Rene Pijlman]

Roy Smith:
>In theory, all exceptions which represent problems with the external 
>environment (rather than programming mistakes) should derive from 
>Exception, but not from StandardError.

Are you sure?

"""
The class hierarchy for built-in exceptions is:

    Exception
     +-- StandardError
     |    +-- KeyboardInterrupt
     |    +-- ImportError
     |    +-- EnvironmentError
     |    |    +-- IOError
"""
http://www.python.org/doc/current/lib/module-exceptions.html

-- 
René Pijlman