Telethon get Telegram chat ID

chat_id.py

# In reference to
# https://stackoverflow.com/a/60982206/823617

# You need a previous Telethon .session file (from some other bot) for this code to work.

import os
import sys
from telethon import TelegramClient
from telethon.utils import get_display_name

session_name = "session_file_name"
api_id = "id"
api_hash = "hash"
dialog_count = 10 # you may change this

client = TelegramClient(session_name, api_id, api_hash)

async def main():
    await client.connect()
    dialogs = await client.get_dialogs(dialog_count)
    for dialog in dialogs:
        print(get_display_name(dialog.entity), dialog.entity.id)

client.loop.run_until_complete(main())