Have you created a Telegram bot without implementing finite automata (FSM)?

Yes, it is possible to create Telegram bots without using finite state machines (FSM). In simple bots, the logic is often built on handling individual commands and messages without explicitly tracking user states. For example, a bot can respond to commands like /start, /help, etc., performing the corresponding actions.

However, when interaction scenarios become more complex, such as needing to remember at which stage of the dialogue the user is (for example, entering multiple sequential data), FSM greatly simplifies state management and transition logic.

An example of a simple bot without FSM in Python using the python-telegram-bot library:

from telegram.ext import Updater, CommandHandler, MessageHandler, Filters

def start(update, context):
    update.message.reply_text('Hello! I am a simple bot without FSM.')

def echo(update, context):
    update.message.reply_text(f'You wrote: {update.message.text}')

updater = Updater('TOKEN')
updater.dispatcher.add_handler(CommandHandler('start', start))
updater.dispatcher.add_handler(MessageHandler(Filters.text & ~Filters.command, echo))

updater.start_polling()
updater.idle()

In this example, the bot simply responds to commands and repeats the text without tracking states.