如何在autobahn python ApplicationSession.__init__中引发异常？

from autobahn.asyncio.wamp import ApplicationSession

class MySession(ApplicationSession):
    def __init__(self, config=None):
        super().__init__(config)

        # 在__init__方法中引发异常
        raise Exception("An error occurred")

    async def onConnect(self):
        # 连接成功后的处理逻辑
        pass

    async def onDisconnect(self):
        # 断开连接后的处理逻辑
        pass

    async def onJoin(self, details):
        # 加入会话后的处理逻辑
        pass

    async def onLeave(self, details):
        # 离开会话后的处理逻辑
        pass

    async def onDisconnect(self):
        # 断开连接后的处理逻辑
        pass

    async def onDisconnect(self):
        # 断开连接后的处理逻辑
        pass

# 创建并运行会话
session = MySession()
session.run("ws://localhost:8080/ws", "realm1")