pip install pywss

from pywss import Pyws, route

@route('/test/example/1')
def example_1(request, data):
  return data + ' - data from pywss'

if __name__ == '__main__':
  ws = Pyws(__name__, address='127.0.0.1', port=8866)
  ws.serve_forever()

ws = new WebSocket("ws://127.0.0.1:8866/test/example/1");
ws.onmessage = function (ev) {
  console.log(JSON.parse(ev.data));
}
ws.onclose = function (ev) {
  console.log('Connect Closed')
}
ws.onopen = function() {
  if (ws.readyState === WebSocket.OPEN) {
    ws.send('hello, pywss!') // you will get 'hello, pywss! - data from pywss'
  }
}