[Baypiggies] How to tell if sys.excepthook has already been overridden?

[Paul McNett]

Hi,

Is there a general way to tell if sys.excepthook has been overridden already or not? 
I want to override it in my library, but only if it hasn't already been overridden by 
some other library or end-application code.

I notice these differences on Python 2.5.4 Mac versus Ubuntu:

Ubuntu:
 >>> print sys.excepthook.__module__
'apport_python_hook'

Mac:
 >>> print sys.excepthook.__module__
'sys'

Paul