How to display messages from the list in a Telegram bot at the user's command?

Question

Python

Hello.

I want to write a fairly simple bot for Telegram. I use telebot. I ran into a problem that I haven't been able to solve on my own.

There is a list with messages. The bot should issue them in order when the user clicks on the "Next task" button. To wait for a response, there is an understandable bot.register_next_step_handler. But how to wrap it in a loop? Or is there some other method.

test_lst = ["test_" + str(i) for i in range(1, 6)]


def next_quest_gui(m):
    markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
    markup.add(*[types.KeyboardButton(name) for name in ["Следующее задание", "Выход"]])
    bot.send_message(m.chat.id, 'Выберите действие', reply_markup=markup)


def action(m):
    send = bot.send_message(m.chat.id, 'Выберите действие')
    bot.register_next_step_handler(send, cycle)


@bot.message_handler(commands=["start"])
def start(m, res=False):
    bot.send_message(m.chat.id, test_lst[0])
    next_quest_gui(m)


@bot.message_handler(content_types=["text"])
def cycle(m):
    index = 0
    if m.text == "Следующее задание":
        index += 1
        bot.send_message(m.chat.id, test_lst[index])
        action(m)
    else:
        bot.send_message(m.chat.id, 'Ваш прогресс сохранен')

Answer 1

Taki found the solution himself: use an iterator for the list. My example code then becomes:

test_lst = ["test_" + str(i) for i in range(1, 6)]
itr = iter(test_lst)

def next_quest_gui(m):
    markup = types.ReplyKeyboardMarkup(resize_keyboard=True)
    markup.add(*[types.KeyboardButton(name) for name in ["Следующее задание", "Выход"]])
    bot.send_message(m.chat.id, 'Выберите действие', reply_markup=markup)


def action(m):
    send = bot.send_message(m.chat.id, 'Выберите действие')
    bot.register_next_step_handler(send, cycle)


@bot.message_handler(commands=["start"])
def start(m, res=False):
    bot.send_message(m.chat.id, next(itr))
    next_quest_gui(m)


@bot.message_handler(content_types=["text"])
def cycle(m):
    if m.text == "Следующее задание":
        msg = bot.send_message(m.chat.id, next(itr))
        bot.register_next_step_handler(msg, cycle)
    else:
        bot.send_message(m.chat.id, 'Ваш прогресс сохранен')