Telegram bot event listener not executing before completion; how to correctly log results?

In my Telegram bot test, the event listener fails to run timely, affecting flag output. How do I restructure to trigger events and manage global variables? Revised sample code below:

from telethon import TelegramClient, events
import appconfig as cfg

bot_instance = TelegramClient('TestInstance', cfg.api_key, cfg.api_secret)

def execute_test():
    result_flag = False
    event_started = False

    @bot_instance.on(events.NewMessage(chats=cfg.bot_handle))
    async def on_message(event):
        nonlocal result_flag, event_started
        if event.sender_id == cfg.bot_id and 'Begin update' in event.raw_text:
            event_started = True
            await bot_instance.send_message(cfg.bot_handle, 'Update Data')
        if event.sender_id == cfg.bot_id and 'Update completed' in event.raw_text and event_started:
            result_flag = True

    bot_instance.start()
    bot_instance.send_message(cfg.bot_handle, '/initiate')
    bot_instance.run_until_disconnected()
    print(result_flag)

execute_test()

hey, try using awaits and your async loop properly make sure you don’t block the event loop. i had issues and restructuring so the listener works better did the trick for me, hope it helps.

Based on my experience, restructuring your event handler can help resolve the sequence issues. The problem might be that send_message is executed before the listener has a chance to catch the events. Consider refactoring the code so that async functions handle message sending after the event has been registered. Also, ensuring that your bot starts its event loop and properly handles asynchronous calls can lead to a smoother execution. This approach can help avoid skipped events and also help maintain the integrity of your state-checking globals.

In my experience, ensuring that event listeners are fully registered before sending any messages was crucial. I once faced a similar issue where my initial command was sent too early, and the listener hadn’t been properly attached. I solved it by restructuring my code to await the client’s start and the complete registration of events. I also added explicit delays in some cases to allow asynchronous callbacks to bind without any overlapping. This method of carefully managing initialization sequences helped me prevent race conditions and ensure that the correct messages updated my state flags.

hey, try adding a tiny delay before triggering the msg. it helps to ensure the handlers are in place. a simple await asyncio.sleep(0.1) did wonders for me. sometimes the listener isn’t fully up when the command fires.