websockets

Warnings

• breaking websockets 16.0 requires Python ≥ 3.10; 15.0 is the last version supporting Python 3.9.
  Fix: Upgrade to Python 3.10 or later.
• breaking Receiving the request path in the second parameter of connection handlers is deprecated; use 'path = request.path' inside the handler function.
  Fix: Update handler functions to access 'path' via 'request.path'.
• gotcha Ensure correct import paths to avoid 'NameError' when importing 'serve' or 'connect'.
  Fix: Use 'from websockets import serve' and 'from websockets import connect'.

Install

• pip install websockets Install websockets

Imports

• serve

  from websockets import serve

  Ensure correct import path to avoid 'NameError'
• connect

  from websockets import connect

  Ensure correct import path to avoid 'NameError'

Quickstart

A simple WebSocket server that echoes messages received from clients.

import asyncio
from websockets import serve

async def handler(websocket, path):
    async for message in websocket:
        await websocket.send(f'Hello, {message}!')

async def main():
    async with serve(handler, 'localhost', 8765):
        await asyncio.Future()  # Run forever

if __name__ == '__main__':
    asyncio.run(main())