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Telethon – Save Telegram channel message as a variable from a NewMessage event – Telegram API

Having read the following question:
How to save message from telegram channel as variable

I need to do the same but from a NewMessage event, storing the content of the message in a variable.

However, neither event.text nor event.raw_test seem to be storable in a variable

The following code:

import asyncio
from telethon import TelegramClient, events

import logging
logging.basicConfig(format='[%(levelname) 5s/%(asctime)s] %(name)s: %(message)s',
                    level=logging.WARNING)

client = TelegramClient('session', 'api_id', 'api_hash')
client.start()


channel = 'xxx'


async def main():
        @client.on(events.NewMessage(chats=channel))
        async def handler(event):
            await print (event.text)

        await client.run_until_disconnected()


loop = asyncio.get_event_loop()
loop.run_until_complete(main())

works printing the new channel message, but it gives me two errors along the printed message:

  • await callback(event)
  • TypeError: object NoneType can’t be used in ‘await’ expression

But when I change

        await print (event.text)

for

        msg = await event.text
        print(msg)

I get the same two errors but this time nothing is printed…and I need to save the text from the message as a variable in order to continue the script.

It also doesnt work declaring the variable msg before the function and making it global inside it.

I dont know what else to try. Thanks in advance.

Tags:

2

Answers


  1. 0 
    from telethon import TelegramClient, events

import logging
logging.basicConfig(format='[%(levelname) 5s/%(asctime)s] %(name)s: %(message)s',
                    level=logging.WARNING)

client = TelegramClient('session', 'api_id', 'api_hash')
client.start()

channel = 'xxx'


@client.on(events.NewMessage(chats=channel))
async def handler(event):
    print(event.message.message)


client.run_until_disconnected()

    You don’t need to wrap listener with another async function. And also, you don’t need to await print, just use plain print

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  2. 0

    The Telethon docs covers this quite well (adapted for your use case):

    from telethon import TelegramClient, events

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

channel = "xxx"

@client.on(events.NewMessage(chats=channel))
async def my_event_handler(event):
    print(event.text) # this doesn't need an "await"

client.start()
client.run_until_disconnected()

    Also notice that I haven’t put the event handler in another function, and the run_until_disconnected() call doesn’t call any function, nor is it in one. You don’t even need to import asyncio

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