Richard Oudkerk added the comment: > I don't quite understand the purpose of your suggestions. What can you do > with it help, what you can not do with contextlib.ExitStack, atexit, > __del__ method, weakref.WeakKeyDictionary or weakref.ref? I read the > documentation, but the meaning eludes me.
finalize does not "compete" with contextlib.ExitStack, atexit and weakref.WeakKeyDictionary. It only competes with __del__ and weakref callbacks. Points 1 and 2 in my first message are the main points. Also, read the warning at http://docs.python.org/py3k/reference/datamodel.html#object.__del__ which also applies to weakref callbacks. Other problems with __del__: * Ref cycles which contain an object with a __del__ method are immortal * __del__ methods can "ressurect" the object. There was actually a proposal to remove or replace __del__ methods in Python 3000. See the "Removing __del__" thread(s): http://mail.python.org/pipermail/python-3000/2006-September/thread.html#3797 As for weakref callbacks, I think they are just too difficult to use correctly unless you are very familiar with them. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15528> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
