[Zope3-dev] Please, no bare 'except:' clauses!

[Steve Alexander]

> try:
> 
> except DatabaseError: # All ZODB/transactional errors (conflicts,
> etc)
> 
> except ZopeError: # All Zope framework exceptions
> 
> except AppError: # All application defined exceptions
> 
> except Exception: # All Python exceptions
> 
> Probably the only one that would not subclass Exception would be 
> DatabaseError, 

Are you sure that's right?

In Zope 3, we seem to have

   Exception <- StandardError <- TransactionError <- ConflictError



> so saying except Exception: would actually be useful 
> since it would trap all errors that were exceptions and no others,
> and modules would not need to be dependant on the ZODB directly just
> to handle exceptions properly.


--
Steve Alexander