Raising objects

[Alex Martelli]

Carlos P. wrote:

> Hi all,
> 
> I have this short question: can the operator 'raise' raise exceptions
> which are instances of object? I'm getting the following behaviour
> from python 2.2.2:

No, in 2.2 (and 2.3 beta 1) exceptions must still be classic-classes
or instances thereof [or strings for backwards compatibility with the
dark and distant past], and should be derived from Exception (but this
is a recommendation, not enforced).  I do not know when (or if) this
restriction will be removed -- in particular, because I do not know
of "use cases" where the ability to raise new-style classes or instances
thereof would be a major boon to an application.  Maybe you have some...?


Alex