Pyglet处理程序和删除的对象

Question

在我的游戏使用Python和pyglet，我有一个传播事件向下给其成员组：

class Group(EventDispatcher): 
    def __init__(self): 
     self.members = [] 
    def add(self, member): 
     self.members.append(member) 
     self.push_handlers(member) 
    def remove(self, member): 
     self.members.remove(member) 
     # and then what??? 
Group.register_event('on_event') 

如果我del我的所有的成员和remove（）的话，会引用组中的处理程序阻止对象被垃圾收集？处理程序是否会消失（weakref）？如果不是，我怎样才能清理处理程序？

编辑：我跑我测试环节，看看会发生什么：

>>> from pyglet.event import EventDispatcher 
>>> class Group(EventDispatcher): 
... pass 
... 
>>> Group.register_event_type('on_tick') 
'on_tick' 
>>> g = Group() 
>>> class Members: 
... def on_tick(self): 
... print('tick') 
... 
>>> m = Members() 
>>> g.push_handlers(m) 
>>> g.dispatch_event('on_tick') 
tick 
>>> del m 
>>> g.dispatch_event('on_tick') 
tick 
>>> class B: 
... def on_tick(self): 
... print(self.x) 
... 
>>> m = B() 
>>> g.push_handlers(m) 
>>> g.dispatch_event('on_tick') 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/usr/lib/python3.2/site-packages/pyglet/event.py", line 355, in dispatch_event 
    if handler(*args): 
    File "<stdin>", line 3, in on_tick 
AttributeError: 'B' object has no attribute 'x' 
>>> m.x = 3 
>>> g.dispatch_event('on_tick') 
3 
tick 
>>> del m 
>>> g.dispatch_event('on_tick') 
3 
tick 

所以我想此事件仍保持对处理程序的引用。因此，问题变成了如何清理处理程序。

Answer 1

EventDispatcher.remove_handlers与push_handlers相反。所以调用remove_handlers（m）然后del m将允许m被垃圾收集。