code: def get_event_loop():
    
    ev = _state.event_loop
    if not os.getenv(_EVENT_LOOP_KEY) and ev is not None:
      ev.clear()
      _state.event_loop = None
      ev = None
    if ev is None:
      ev = EventLoop()
      _state.event_loop = ev
      os.environ[_EVENT_LOOP_KEY] = '1'
    return ev
docs: Return a EventLoop instance.
  
    A new instance is created for each new HTTP request.  We determine
    that we're in a new request by inspecting os.environ, which is reset
    at the start of each request.  Also, each thread gets its own loop.