Telegram Telethon API

listen_to_new_messages.py

from telethon import TelegramClient, events

api_id = 123456
api_hash = '<someHash>'
channel = '@someChannel'

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

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

client.start()
client.run_until_disconnected()

read_history.py

from telethon.sync import TelegramClient, events
from telethon.tl.functions.messages import GetHistoryRequest

api_id = 123456
api_hash = '<someHash>'
channel = '@someChannel'

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

for message in client.get_messages(channel, limit=10):
    print(message.message)

client.run_until_disconnected()