aiogram/docs/index.md
mpa 4124770b0e refactor(handler): rename observers
Rename observers but with backward compatibility, relevant documentation
2020-05-10 03:02:31 +04:00

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# Overview
Documentation for version 3.0 [WIP] [^1]
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[![\[Telegram\] aiogram live](https://img.shields.io/badge/telegram-aiogram-blue.svg)](https://t.me/aiogram_live)
**aiogram** modern and fully asynchronous framework for [Telegram Bot API](https://core.telegram.org/bots/api) written in Python 3.7 with [asyncio](https://docs.python.org/3/library/asyncio.html) and [aiohttp](https://github.com/aio-libs/aiohttp). It helps you to make your bots faster and simpler.
## Features
- Asynchronous ([asyncio docs](https://docs.python.org/3/library/asyncio.html), [PEP-492](https://www.python.org/dev/peps/pep-0492/))
- [Supports Telegram Bot API v{!_api_version.md!}](api/index.md)
- [Updates router](dispatcher/index.md) (Blueprints)
- Finite State Machine
- [Middlewares](dispatcher/middlewares/index.md)
- [Replies into Webhook](https://core.telegram.org/bots/faq#how-can-i-make-requests-in-response-to-updates)
!!! note
Before start using **aiogram** is highly recommend to know how to work with [asyncio](https://docs.python.org/3/library/asyncio.html).
Also if you has questions you can go to our community chats in Telegram:
- [English language](https://t.me/aiogram)
- [Russian language](https://t.me/aiogram_ru)
## Example
Simple usage
```python3
from aiogram import Bot, Dispatcher, types
from aiogram.dispatcher.handler import MessageHandler
TOKEN = "42:TOKEN"
dp = Dispatcher()
@dp.message(commands=["start"])
class MyHandler(MessageHandler):
"""
This handler receive messages with `/start` command
"""
async def handle(self):
await self.event.answer(f"<b>Hello, {self.from_user.full_name}!</b>")
@dp.message(content_types=[types.ContentType.ANY])
async def echo_handler(message: types.Message, bot: Bot):
"""
Handler will forward received message back to the sender
"""
await bot.forward_message(
from_chat_id=message.chat.id, chat_id=message.chat.id, message_id=message.message_id
)
def main():
bot = Bot(TOKEN, parse_mode="HTML")
dp.run_polling(bot)
if __name__ == "__main__":
main()
```
## Task list for 3.0
Partial list of plans for this big release is listed [here](todo.md).
[^1]: work in progress