✨ The little ASGI framework that shines. ✨
Documentation: https://www.starlette.io/
Starlette is a lightweight ASGI framework/toolkit, which is ideal for building high performance asyncio services.
It is production-ready, and gives you the following:
requests
.Python 3.6+
$ pip3 install starlette
You'll also want to install an ASGI server, such as uvicorn, daphne, or hypercorn.
$ pip3 install uvicorn
from starlette.applications import Starlette
from starlette.responses import JSONResponse
import uvicorn
app = Starlette(debug=True)
@app.route('/')
async def homepage(request):
return JSONResponse({'hello': 'world'})
if __name__ == '__main__':
uvicorn.run(app, host='0.0.0.0', port=8000)
For a more complete example, see encode/starlette-example.
Starlette does not have any hard dependencies, but the following are optional:
requests
- Required if you want to use the TestClient
.aiofiles
- Required if you want to use FileResponse
or StaticFiles
.jinja2
- Required if you want to use Jinja2Templates
.python-multipart
- Required if you want to support form parsing, with request.form()
.itsdangerous
- Required for SessionMiddleware
support.pyyaml
- Required for SchemaGenerator
support.graphene
- Required for GraphQLApp
support.ujson
- Required if you want to use UJSONResponse
.You can install all of these with pip3 install starlette[full]
.
Starlette is designed to be used either as a complete framework, or as an ASGI toolkit. You can use any of its components independently.
from starlette.responses import PlainTextResponse
class App:
def __init__(self, scope):
assert scope['type'] == 'http'
self.scope = scope
async def __call__(self, receive, send):
response = PlainTextResponse('Hello, world!')
await response(receive, send)
Run the App
application in example.py
:
$ uvicorn example:App
INFO: Started server process [11509]
INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
Run uvicorn with --reload
to enable auto-reloading on code changes.
The modularity that Starlette is designed on promotes building re-usable components that can be shared between any ASGI framework. This should enable an ecosystem of shared middleware and mountable applications.
The clean API separation also means it's easier to understand each component in isolation.
Independent TechEmpower benchmarks show Starlette applications running under Uvicorn as one of the fastest Python frameworks available. (*)
For high throughput loads you should:
ujson
and use UJSONResponse
.uvicorn
worker class.Eg.
gunicorn -w 4 -k uvicorn.workers.UvicornWorker --log-level warning example:app
Several of the ASGI servers also have pure Python implementations available,
so you can also run under PyPy
if your application code has parts that are
CPU constrained.
Either programatically:
uvicorn.run(..., http='h11', loop='asyncio')
Or using Gunicorn:
gunicorn -k uvicorn.workers.UvicornH11Worker ...
— ⭐️ —
Starlette is BSD licensed code. Designed & built in Brighton, England.
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。
1. 开源生态
2. 协作、人、软件
3. 评估模型