Simplest Telethon Client with an minimum of functionality

telethon_client.py

import io, asyncio
from asyncio import sleep
from telethon import TelegramClient, events
from telethon.events import NewMessage, MessageEdited

client = TelegramClient("session", 4, "014b35b6184100b085b0d0572f9b5103")

@client.on(events.ChatAction(func=lambda e: e.chat.id == 1234567890))
async def welcome(event):
    if event.user_joined or event.user_added:
        await event.reply("Hi there, welcome to group")
        await asyncio.sleep(5)


@client.on(events.NewMessage(outgoing=True, pattern=r"(?i).*(\,r)"))
@client.on(events.MessageEdited(outgoing=True, pattern=r"(?i).*(\,r)"))
async def raw(event: NewMessage.Event) -> None:
    the_real_message = None
    reply_to_id = None
    if event.reply_to_msg_id:
        previous_message = await event.get_reply_message()
        the_real_message = previous_message.stringify()
        reply_to_id = event.reply_to_msg_id
    else:
        the_real_message = event.stringify()
        reply_to_id = event.message.id
    if len(the_real_message) > 4096:
        with io.BytesIO(str.encode(the_real_message)) as out_file:
            out_file.name = "raw.txt"
            await client.send_file(
                event.chat_id,
                out_file,
                force_document=True,
                allow_cache=False,
                reply_to=reply_to_id,
            )
            await event.delete()
    else:
        await client.send_message("me", f"```{the_real_message}```")
    await event.delete()


client.start()
client.run_until_disconnected()