Antoine Pitrou <pit...@free.fr> added the comment: > In the documentation on weakrefs there is the following quote > > Note: Weak references to an object are cleared before the object’s > __del__() is called, to ensure that the weak reference callback > (if any) finds the object still alive. > > But I think the weakref is always dead by the time the callback is > invoked.
It's true, the doc needs fixing. > Which does prompt a question: what use is there for the weakref > argument to the callback if it already dead? The weakref is "dead" but it's still a weakref, and it can be used to e.g. index a container of existing weakrefs (cf. WeakSet, WeakKeyDictionary, WeakValueDictionary). ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue15412> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
