def _get_shutter_speed(self):
    self._check_camera_open()
    return int(self._camera.control.params[mmal.MMAL_PARAMETER_SHUTTER_SPEED])
def _get_shutter_speed(self):
    self._check_camera_open()
    return int(self._camera.control.params[mmal.MMAL_PARAMETER_SHUTTER_SPEED])