@app.get("/sse")
def sse():
    if "text/event-stream" not in request.accept_mimetypes:
        abort(400)
    def send_events():
        nonlocal variable
        while True:
            event_binary = b''
            if condition:
              data = ...
              _event = ...
              event = ServerSentEvent(data, _event)
              event_binary = event.encode()
               yield event_binary
            time.sleep(0.1)

    response = Response(
        send_events(),
        mimetype="text/event-stream",
    )
    response.timeout = None
    return response

@app.get("/sse")
def sse():
    if "text/event-stream" not in request.accept_mimetypes:
        abort(400)
    def send_events():
        nonlocal variable
        while True:
            event_binary = b''
            if condition:
              data = ...
              _event = ...
              event = ServerSentEvent(data, _event)
              event_binary = event.encode()
               yield event_binary
            time.sleep(0.1)

    response = Response(
        send_events(),
        mimetype="text/event-stream",
    )
    response.timeout = None
    return response