def _set_shutter_speed(self, value):
    self._check_camera_open()
    self._camera.control.params[mmal.MMAL_PARAMETER_SHUTTER_SPEED] = value
def _set_shutter_speed(self, value):
    self._check_camera_open()
    self._camera.control.params[mmal.MMAL_PARAMETER_SHUTTER_SPEED] = value