--- title: ASGI Frameworks for Python Are Here published: true date: 2020-06-06 17:01:00 UTC tags: python, web, api, frameworks canonical_url: https://cheshire.io/posts/06-06-2020-asgi-frameworks/ --- ## ASGI, WSGI, and Python Most popular Python web frameworks, such as Django and Flask, works with WSGI (Web Server Gateway Interface) under the hood, which has been around since[PEP 333](https://www.python.org/dev/peps/pep-0333/) in 2003, and its update [PEP 3333](https://www.python.org/dev/peps/pep-3333/) in 2010. With the introduction of asyncio in Python 3 and `await` syntax in Python 3.5,the Python community finally has an easy way to do asynchronous programming. It was only a matter of time before steam would pick up for asynchronous support for web frameworks in the form of [ASGI](https://asgi.readthedocs.io/en/latest/specs/main.html) (Asynchronous Server Gateway Interface). Major web frameworks are currently working to go async, including [Django](https://docs.djangoproject.com/en/dev/releases/3.1/),which is a major effort itself given the size of the framework. [Flask](https://flask.palletsprojects.com/en/1.1.x/),which uses [Werkzeug](https://github.com/pallets/werkzeug/issues/1322#issuecomment-601062396) internally, does not have ASGI support yet. If you are building a new Python-based web project today, the new of ASGI web frameworks should be on your list for consideration; they “generally” perform faster than their WSGI-only counterparts for the same workload, and while [benchmarks](https://www.techempower.com/benchmarks/#section=data-r19&hw=cl&test=composite&l=zijzen-1r) are helpful, it is still best to benchmark it against your own use cases. ![TechEmpower Benchmarks Round 19](https://cheshire.io/images/asgi/benchmarks.png) TechEmpower Benchmarks Round 19:
ASGI-based web frameworks perform much better than their WSGI-only counterparts ## Try an ASGI-Supported Web Framework Today **If you are looking for a Django-like experience** for a full web framework,[FastAPI](https://fastapi.tiangolo.com/) would offer the closest experience. There’s full support for [Pydantic](https://fastapi.tiangolo.com/features/#just-modern-python), which makes the experience more pure Python than to learn a new framework-specific API. ![FastAPI Logo](https://cheshire.io/images/asgi/fastapi.png) FastAPI is your best choice for a full web framework **If you are looking for a Flask-like experience** for a micro-web framework,you will be spoiled for options. - [Quart](https://pgjones.gitlab.io/quart/index.html) offers full-API compatibility with Flask, and should be the first place where you start - [Vibora](https://vibora.io/) has an API inspired by Flask with an obsession for speed - [Sanic](https://sanic.readthedocs.io/en/latest/) is also inspired by Flask but has different design decisions from Vibora ``` from quart import Quart app = Quart( __name__ ) @app.route('/') async def hello(): return 'hello' app.run() ``` Quart’s Flask-Compatible API **If you are looking for an ASGI framework/toolkit** , [Starlette](https://www.starlette.io/) will be the one to go for. It is lower level than the ones listed above as it is ultimately a toolkit, but you might find it useful for developing your own frameworks. [Starlette-Starter](https://github.com/victorneo/starlette-starter) is a boilerplate that I have built for my own API projects, which might be helpful for you if you are looking for a starting point for your own frameworks. ![Starlette Logo](https://cheshire.io/images/asgi/starlette.png) Starlette, an ASGI Framework / Toolkit If you try any of the frameworks above, I will be happy to hear more about your explorations with them here or on [Twitter](https://twitter.com/victorneo).

victorneo

ASGI Frameworks for Python Are Here

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