[PythonLabs] Re: [Python-Dev] Re: [Python-checkins]python/dist/src/Modules
Sun, 06 Apr 2003 07:07:44 -0400
Tim Peters wrote:
> While a __getattr__ side effect may resurrect an object in gc's unreachable
> list, gc has no way to know that an object has been resurrected short of
> starting over again. In the absence of that, the object remains in gc's
> unreachable list, and its tp_clear slot eventually gets called. The
> internal C stuff remains self-consistent, so this won't cause a segfault
> (etc), but it may (as above) be surprising. I don't see a sane way to fix
> this so long as asking whether __del__ exists can execute arbitrary mounds
> of Python code.
If I understand the problem, it can be avoided by avoiding old-style classes.
Maybe it's time to, at least optionally, cause a warning when old-style classes
are used. :) I'm not kidding for Zope. I think it might be worth-while
to be issue such a warning in Zope.
Jim Fulton mailto:firstname.lastname@example.org Python Powered!
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