[Python-Dev] Deprecating string exceptions

[Guido van Rossum]

> I didn't read most of this length thread the first time through, but I
> did run into the bug today in my own code and tried to fix it.  I
> added a patch to 518846 that allows instances of new style classes,
> where the check is implemented by checking Py_TPFLAGS_HEAPTYPE, which
> is only defined for objects created by class statements (I think).
> 
> This doesn't seem to cause any change in the behavior of string-based
> exceptions.  I don't think it's necessary to have "except str:" catch
> string-based exceptions, because they're supported solely for
> backwards compatibility.
> 
> There was also some discussion of making exceptions inherit from
> Exception, but I think that's a separate issue.
> 
> Any reason not to commit the patch?

In how many places have you posted about this issue?  This is the
third place where I see you trying to get people's attention.  What's
the urgency? :-)

I don't think the patch is ready yet, see my comment on SF.  If we
decide that anything needs to be done in this area I want to look at
it first, so please don't check anything in yet.

--Guido van Rossum (home page: http://www.python.org/~guido/)