如何在telethon中留下带有id的频道或群组？

from telethon.sync import TelegramClient
from telethon.tl.functions.messages import SendMessageRequest

api_id = '你的API ID'
api_hash = '你的API哈希'
session_file = '会话文件路径'

client = TelegramClient(session_file, api_id, api_hash)
client.start()

channel_entity = client.get_entity('频道名称或ID')

message = '这是一条带有ID的消息，实体ID为：{}'.format(channel_entity.id)
request = SendMessageRequest(peer=channel_entity, message=message)
client(request)