guardado de resultado de tiro dentro del manejador de rutinas

views.py

                xy = json.loads(recv_data)
                print("desempaquetado", xy)
                print finishTime
                print datetime.now().strftime("%H:%M:%S:%f")
                startTime = datetime.now().replace(hour=startTime.hour, minute=startTime.minute,
                                                   second=startTime.second,
                                                   microsecond=startTime.microsecond)
                finishTime = datetime.now().replace(hour=finishTime.hour, minute=finishTime.minute,
                                                    second=finishTime.second,
                                                    microsecond=finishTime.microsecond)

                delta = (finishTime - startTime).total_seconds()
                target_x = tiro.x_initial + (tiro.x_final - tiro.x_initial) * (delta / tiro.time)
                target_y = tiro.y_initial + (tiro.y_final - tiro.y_initial) * (delta / tiro.time)
                distance = math.sqrt(math.pow(xy['x'] - target_x, 2) + math.pow(xy['y'] - target_y, 2))
                r = Resultado(startTime=startTime,
                              finishTime=finishTime,
                              x=xy['x'],
                              y=xy['y'],
                              distance=distance,
                              sesion=sesion,
                              tiro=tiro)
                r.save()

                # crear o actualizar estadisticas
                statistics = Estadisticas.objects.filter(deportista=deportista_pk)
                acierto = 0
                if distance < 2 * tiro.radius:  # TODO: the minimun distance should be calculated more accurately!
                    acierto = 1
                if len(statistics) == 0:
                    estadistica = Estadisticas()
                    estadistica.tiros = 1
                    estadistica.aciertos = acierto
                    estadistica.tiempo_total = tiro.time
                    estadistica.tiempo_utilizado = delta
                    estadistica.deportista = Deportista.objects.get(pk=deportista_pk)
                    estadistica.save()
                elif len(statistics) == 1:
                    estadistica = statistics[0]
                    estadistica.actualizar(1, acierto, tiro.time, delta)
                    estadistica.save()

                sock.close()
                url = reverse_lazy("controller:resultado_show",
                                   args=[entrenador_pk, deportista_pk, rutina_pk,
                                         unicode(tiro.id), unicode(r.id)])
                return redirect(url)