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A sane Discord API for Python 3 built on asyncio and good intentions

Project description

Note: this API is still under active daily development, and is in a pre-alpha stage. If you are looking to give feedback, or want to help us out, then feel free to join our Discord server and chat to us. Any help is greatly appreciated, no matter what your experience level may be! :-)


hikari

An opinionated, static typed Discord API for Python3 and asyncio.

Built on good intentions and the hope that it will be extendable and reusable, rather than an obstacle for future development.

import hikari
from hikari.events.message import MessageCreateEvent

bot = hikari.Bot(token="...")


@bot.listen(MessageCreateEvent)
async def ping(event):
    # If a non-bot user sends a message "hk.ping", respond with "Pong!"

    if not event.message.author.is_bot and event.message.content.startswith("hk.ping"):
        await event.message.reply("Pong!")


bot.run()

Installation

Install hikari from PyPI with the following command:

python -m pip install hikari -U --pre
# Windows users may need to run this instead...
py -3 -m pip install hikari -U --pre 

What does hikari aim to do?

  • Provide 100% documentation for the entire library. Build your application bottom-up or top-down with comprehensive documentation as standard. Currently more than 45% of this codebase consists of documentation.
  • Ensure all components are reusable. Most people want a basic framework for writing a bot, and hikari will provide that. However, if you decide on a bespoke solution using custom components, such as a Redis state cache, or a system where all events get put on a message queue, then hikari provides the conduit to make that happen.
  • Automate testing as much as possible. You don't want to introduce bugs into your bot with version updates, and neither do we. hikari aims for 100% test coverage as standard. This significantly reduces the amount of bugs and broken features that appear in library releases -- something most Python Discord libraries cannot provide any guarantee of.
  • Small improvements. Regularly. Discord is known for pushing sudden changes to their public APIs with little or no warning. When this happens, you want a fix, and quickly. You do not want to wait for weeks for a usable solution to be released. hikari is developed using a fully automated CI pipeline with extensive quality assurance. This enables bugfixes and new features to be shipped within 30 minutes of coding them, not 30 days.

What does hikari currently support?

Library features

hikari has been designed with the best practises at heart to allow developers to freely contribute and help the library grow. This is achieved in multiple ways.

  • Modular, reusable components.
  • Extensive documentation.
  • Support for using type hints to infer event types.
  • Minimal dependencies.
  • Rapidly evolving codebase.
  • Full unit test suite.

Network level components

The heart of any application that uses Discord is the network layer. hikari exposes all of these components with full documentation and with the ability to reuse them in as many ways as you can think of.

Most mainstream Python Discord APIs lack one or more of the following features. hikari aims to implement each feature as part of the design, rather than an additional component. This enables you to utilize these components as a black box where necessary.

  • Low level HTTP API implementation.
  • Low level gateway websocket shard implementation.
  • Rate limiting that complies with the X-RateLimit-Bucket header properly.
  • Gateway websocket ratelimiting (prevents your websocket getting completely invalidated).
  • Intents.
  • Proxy support for websockets and HTTP API.
  • File IO that doesn't block you.
  • Fluent Pythonic API that does not limit your creativity.

High level components

  • Stateless, object-oriented bot API. Serve thousands of servers on little memory.
  • Sensible, type-safe event dispatching system that is reactive to type annotations, and supports PEP-563 without broken hacks and bodges.
  • Models that extend the format provided by Discord, not fight against it. Working as close to the original format of information provided by Discord as possible ensures that minimal changes are required when a breaking API design is introduced. This reduces the amount of stuff you need to fix in your applications as a result.
  • Standalone HTTP client. Not writing a bot, but need to use the API anyway? Simply initialize a hikari.RESTClient and away you go.

Stuff coming soon

  • Optional, optimised C implementations of internals to give large applications a well-deserved performance boost.

Planned extension modules for the future

  • Command framework (make commands and groups with the flick of a wrist).
  • Optional dependency injection tools (declare what components you want in your application, and where you want them. Let hikari work out how to put it together!)
  • Full voice transcoding support, natively in your application. Do not rely on invoking ffmpeg in a subprocess ever again!

Getting started

This section is still very bare, and we are still actively writing this framework every day. Why not pop in and say hi? More comprehensive tutorials will be provided soon!

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