使用类变量时，“ global”名称未定义错误

问题描述

由于某种原因，我在这里收到全局名称未定义的错误。问题出在 addClient 方法中，在这里我增加了全局变量 joinID 。它抛出一个错误 NameError：未定义全局名 joinID 。我在做什么错？

For some reason I'm getting a global name is not defined error here. The issue lies in the addClient method where I am incrementing my global variable joinID. It throws me an error NameError: global name 'joinID' is not defined. What am I doing wrong?

class Chatroom:
    clients = []
    joinID = 0

    def __init__(self,name,refNum):
        self.refNum = refNum
        self.name = name

    def addClient(self,clientName):
        global clients
        global joinID
        joinID = joinID+1
        clients.append(clientName, joinID)

    def removeClient(self, clientName, joinID):
        global clients
        clients.remove(clientName, joinID)

推荐答案

将变量带到类之外

joinID=0
clients=[]
class Chatroom:
    def __init__(self,name,refNum):

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