Added lost files

examples/finite_state_machine.py

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+import asyncio
+import logging
+import sys
+from os import getenv
+
+from aiogram import Bot, Dispatcher, F
+from aiogram.dispatcher.filters import Command
+from aiogram.dispatcher.fsm.context import FSMContext
+from aiogram.dispatcher.fsm.state import State, StatesGroup
+from aiogram.types import Message, ReplyKeyboardRemove, ReplyKeyboardMarkup, KeyboardButton
+from aiogram.utils.markdown import hbold
+from aiogram.utils.markup import KeyboardConstructor
+
+GENDERS = ["Male", "Female", "Helicopter", "Other"]
+
+dp = Dispatcher()
+
+
+# States
+class Form(StatesGroup):
+    name = State()  # Will be represented in storage as 'Form:name'
+    age = State()  # Will be represented in storage as 'Form:age'
+    gender = State()  # Will be represented in storage as 'Form:gender'
+
+
+@dp.message(Command(commands=["start"]))
+async def cmd_start(message: Message, state: FSMContext):
+    """
+    Conversation's entry point
+    """
+    # Set state
+    await state.set_state(Form.name)
+    await message.answer("Hi there! What's your name?")
+
+
+@dp.message(Command(commands=["cancel"]))
+@dp.message(F.text.lower() == "cancel")
+async def cancel_handler(message: Message, state: FSMContext):
+    """
+    Allow user to cancel any action
+    """
+    current_state = await state.get_state()
+    if current_state is None:
+        return
+
+    logging.info("Cancelling state %r", current_state)
+    # Cancel state and inform user about it
+    await state.clear()
+    # And remove keyboard (just in case)
+    await message.answer("Cancelled.", reply_markup=ReplyKeyboardRemove())
+
+
+@dp.message(Form.name)
+async def process_name(message: Message, state: FSMContext):
+    """
+    Process user name
+    """
+    await state.update_data(name=message.text)
+    await state.set_state(Form.age)
+    await message.answer("How old are you?")
+
+
+# Check age. Age gotta be digit
+@dp.message(Form.age, ~F.text.isdigit())
+async def process_age_invalid(message: Message):
+    """
+    If age is invalid
+    """
+    return await message.answer("Age gotta be a number.\nHow old are you? (digits only)")
+
+
+@dp.message(Form.age)
+async def process_age(message: Message, state: FSMContext):
+    # Update state and data
+    await state.set_state(Form.gender)
+    await state.update_data(age=int(message.text))
+
+    # Configure ReplyKeyboardMarkup
+    constructor = KeyboardConstructor(KeyboardButton)
+    constructor.add(*(KeyboardButton(text=text) for text in GENDERS)).adjust(2)
+    markup = ReplyKeyboardMarkup(
+        resize_keyboard=True, selective=True, keyboard=constructor.export()
+    )
+    await message.reply("What is your gender?", reply_markup=markup)
+
+
+@dp.message(Form.gender)
+async def process_gender(message: Message, state: FSMContext):
+    data = await state.update_data(gender=message.text)
+    await state.clear()
+
+    # And send message
+    await message.answer(
+        (
+            f'Hi, nice to meet you, {hbold(data["name"])}\n'
+            f'Age: {hbold(data["age"])}\n'
+            f'Gender: {hbold(data["gender"])}\n'
+        ),
+        reply_markup=ReplyKeyboardRemove(),
+    )
+
+
+async def main():
+    bot = Bot(token=getenv("TELEGRAM_TOKEN"), parse_mode="HTML")
+
+    await dp.start_polling(bot)
+
+
+if __name__ == "__main__":
+    logging.basicConfig(level=logging.INFO, stream=sys.stdout)
+    asyncio.run(main())