Telethon不适用于频道ID，而是使用用户名。

Question

嗨，我想尝试每次频道发送新消息时都会收到通知，为此我创建了以下代码片段：

from telethon import TelegramClient, events

api_id = XXXX
api_hash = 'XXXXXXX'
channelId = '-100XXXXXXXX'



client = TelegramClient('anon', api_id, api_hash)

client.start()

@client.on(events.NewMessage(chats = [channelId]))

async def main(event):
    

    
 # print(event.raw_text) 
    

client.run_until_disconnected()

但是我不明白为什么只有在channelID中使用用户名时才能工作，我想使用ID，因为某些通道是私有的。

我使用电报中的bot "@username_to_id_bot“通过通道链接检索ID。

当使用用户名时，工作正常，但当我使用ID o通道时，返回以下错误：

Task exception was never retrieved
future: <Task finished name='Task-10' coro=<UpdateMethods._dispatch_update() done, defined at C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\client\updates.py:399> exception=ValueError('Cannot find any entity corresponding to "-100XXXXXXXX"')>
Traceback (most recent call last):
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\client\updates.py", line 458, in _dispatch_update
    await builder.resolve(self)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\events\common.py", line 99, in resolve
    await self._resolve(client)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\events\newmessage.py", line 93, in _resolve
    await super()._resolve(client)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\events\common.py", line 103, in _resolve
    self.chats = await _into_id_set(client, self.chats)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\events\common.py", line 33, in _into_id_set
    chat = await client.get_input_entity(chat)
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\client\users.py", line 437, in get_input_entity
    await self._get_entity_from_string(peer))
  File "C:\Users\Administrator\AppData\Local\Programs\Python\Python310\lib\site-packages\telethon\client\users.py", line 574, in _get_entity_from_string
    raise ValueError(
ValueError: Cannot find any entity corresponding to "-100xxxxx"

我也曾试图通过类似于这个例子的实体，但没有成功：

https://ingrom.com/python/47397/telethon-get-channel-id

有人能帮我找到解决办法吗？

Answer 1

这里

@client.on(events.NewMessage(chats = [channelId]))

您应该使用entity而不是chats，比如

@client.on(events.NewMessage(entity = channelId, message = "message you need to send"))