Websocket Echoサーバーを実装する

  #!/usr/bin/env python

  import asyncio
  import websockets

  async def echo(websocket, path):
      async for message in websocket:
          print(f"recv {len(message)}")
          await websocket.send(message)

  start_server = websockets.serve(echo, "localhost", 8765)

  asyncio.get_event_loop().run_until_complete(start_server)
  asyncio.get_event_loop().run_forever()

import asyncio
import websockets

async def hello():
    uri = "ws://localhost:8765"
    async with websockets.connect(uri) as websocket:
        await websocket.send("Hello world!")
        await websocket.recv()

asyncio.get_event_loop().run_until_complete(hello())