import logging
from telegram.ext import Updater
logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
class Bot:
    def __init__(self, token):
        self.updater = Updater(token=token, use_context=True)
        self.dispatcher = self.updater.dispatcher

    def cmd_start(self, update, context):
        context.bot.send_message(chat_id=update.effective_chat.id, text=f'Hi! effective_chat.id={update.effective_chat.id}')
    
    def run(self):
        self.updater.start_polling()


if __name__ == '__main__':
    b = Bot('TOKEN')
    b.run()