Telethon , telegram , join telegram channels from a list

#channel joiner.md

Here is an example of .env file you need to use:

Make sure to have telethon and python-dotenv installed.

join_channels.py

# make sure to have telethon and python-dotenv installed
# create a file called .env in the current directory from where you are running the script
# put API_ID and  API_HASH in the .env file in the following format
# VARIABLE=VALUE


from telethon.sync import TelegramClient
from telethon.tl.functions.channels import JoinChannelRequest
from telethon.errors.rpcerrorlist import FloodWaitError

from dotenv import load_dotenv
import os
import asyncio

load_dotenv()
API_ID = os.getenv('API_ID')
API_HASH = os.getenv('API_HASH')


CHANNELS = ['a', 'b', 'c']  # the channels you want to join


async def main():
    async with TelegramClient('tg_session', API_ID, API_HASH) as client:
        for channel in CHANNELS:
            try:
                await client(JoinChannelRequest(channel))
            except FloodWaitError as fwe:
                print(f'Waiting for {fwe}')
                await asyncio.sleep(delay=fwe.seconds)
            except Exception as err:
                print(f"Encountered an error while joining {channel}\n{err}")

asyncio.run(main())