#!/usr/bin/env python # encoding: utf-8 # # Copyright (c) 2008 Doug Hellmann All rights reserved. # """Example using weakref.ref to manage a reference to an object. """ #end_pymotw_header import weakref class ExpensiveObject(object): def __del__(self): print '(Deleting %s)' % self obj = ExpensiveObject() r = weakref.ref(obj) print 'obj:', obj print 'ref:', r print 'r():', r() print 'deleting obj' del obj print 'r():', r()