from telegram.ext import Updater, CommandHandler
def start(update, context):
context.bot.send_message(chat_id=update.effective_chat.id, text="Привет! Я телеграмм бот.")
def main():
updater = Updater(token='YOUR_TOKEN', use_context=True)
dp = updater.dispatcher
dp.add_handler(CommandHandler('start', start))
updater.start_polling()
updater.idle()
if __name__ == '__main__':
main()