Discord.py 字典运行时错误

Question

所以，我一直在尝试制作一个循环遍历我服务器中所有成员的机器人。我正在使用 get_all_members() 生成器来执行此操作。

for member in client.get_all_members():
      userName = str(member.name)
      userGame = str(member.game)
      userID = str(member.id)
      print(userName, userGame, userID)
      await client.send_message(message.channel, "User " + userName + " 
      (<@" + userID + ">) is playing " + userGame)

我在运行时随机遇到这个错误：

File "C:\Program Files\Python36\lib\site-packages\discord\client.py", line 307, in _run_event 
    yield from getattr(self, event)(*args, **kwargs) 
File "C:\Users\Stefan\Source\Repos\AABot3\AABot3\AABot3.py", line 41, in on_message 
    for member in client.get_all_members(): 
File "C:\Program Files\Python36\lib\site-packages\discord\client.py", line 595, in get_all_members 
    for member in server.members: 
RuntimeError: dictionary changed size during iteration –

如何避免这个错误？

Answer 1

尝试从 get_all_members 中创建一个列表，然后再遍历它。

for member in list(client.get_all_members()):
    ...

发生的事情是 Server 对象将它们的 Member 存储在字典中。当你 await 一个协程时，你允许其他协程在你等待时运行，其中之一使 Server 对象保持最新。每当 Server 的成员发生变化时，字典也会发生变化。因为您永远不应该在某些东西发生变化时对其进行迭代，所以 Python 会检测到这一点并终止程序。

通过先将值读入列表，我们不会注意到字典何时更改。

最新版本改变了这个行为，讨论here

Discord.py 字典运行时错误

Discord.py Runtime error with dictionaries

python

discord

members