tg-3.py

def main():
    try:
        print("Listening to Telegram Channel...")
        updater = Updater(token)
        dp = updater.dispatcher
        conv_handler = ConversationHandler(
            entry_points=[CommandHandler('start', start)],

            states={
                SIGNALS: []
            },

            fallbacks=[CommandHandler('cancel', cancel)]
        )

        dp.add_handler(conv_handler)
        dp.add_error_handler(error)
        updater.start_polling()
        updater.idle()
    except Exception as e:
        log(e)
        
        
if __name__ == '__main__':
    main()