![]() ![]() TheĪsyncIO ecosystem isn’t as mature as the WSGI/Flask ecosystem, but FastAPI looks like one of the big future frameworks Now, I would consider using FastAPI over Flask. In the past, if you wereĬreating a small API application, Flask would be the choice. Starlette under the hood, FastAPI’s performance is near the top ofĪs the name implies, FastAPI is intended for API applications, and this is where it excels. By adding Pydantic, FastAPI endpoints validate input data and auto generate documentation.įastAPI is maintained by Sebastián Ramírez who has sponsor funding for FastAPI. Pydantic, a Python package that provides data validation and settings management close () def startup (): print ( 'Ready to go' ) routes = app = Starlette ( debug = True, routes = routes, on_startup = ) FastAPIįastAPI is a framework built on top of Starlette that adds send_text ( 'Hello, websocket!' ) await websocket. path_params return PlainTextResponse ( 'Hello, %s !' % username ) async def websocket_endpoint ( websocket ): await websocket. ![]() Code Exampleįrom starlette.applications import Starlette from starlette.responses import PlainTextResponse from starlette.routing import ( Route, Mount, WebSocketRoute ) from starlette.staticfiles import StaticFiles def homepage ( request ): return PlainTextResponse ( 'Hello, world!' ) def user_me ( request ): username = "John Doe" return PlainTextResponse ( 'Hello, %s !' % username ) def user ( request ): username = request. Uvicorn also implements anĪlternative gunicorn worker with support for PyPy. ![]() Gunicorn is a fantastic, battle-tested process manager and WSGI server for Python,Īnd combining it with uvicorn gives you one of the best ASGI servers. Uvicorn implements a gunicorn worker, that allows you Httptools, Python bindings for the NodeJS HTTP parser. Uvicorn tends to be close to the top in popular performance benchmarksĭue to its use of uvloop, an alternative event loop, and The company started by Tom Christie, the creator of Django REST Framework, maintains Uvicorn supports the HTTP and WebSocket protocols. AsyncIO Package Ecosystem Overview Servers Uvicorn ASGI is aįundamental redesign of WSGI that enables support for newer protocols such as HTTP/2, HTTP/3, and WebSocket. The legacy of WSGI by allowing the same interchangeability in the new world of asynchronous Python. WSGI accepts a request and returnsĪ response, which doesn’t work for newer protocols such as WebSocket. The release of Pythonģ.6, in 2016, added the async and await keywords, which enable non-blocking I/O. The RFC for the WebSocket protocol was finalized in 2013. Since 2003, web application development and network protocols have evolved and changed. Pyramid are compatible with servers such asīetween 2003, when PEP 333 was published, and now, in 2022, WSGI has seen near universal adoption with all popular Python WSGIĬreated a common interface that promoted interchangeability between web frameworks and web servers. PEP 333 created the v1.0 implementation of WSGI to give Python a standard similar to Java’s servlet API. Prior to PEP 333, Python web application frameworks, such as Zope, Quixote,Īnd Twisted Web would each be written against specific web server APIs such as CGI or mod_python. ![]() A Brief History of Python Web Server InterfacesĪ Brief History of Python Web Server Interfaces.These shiny new frameworks such as FastAPI, Starlette, or Quart? Table of Contents Python’s AsyncIO web ecosystem continues to mature, but should you build your next production application with one of ![]()
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