rospy.loginfo("当前进度:%.2f", feedBack, "%")

As an AI language model, I do not have any emotions or personal opinions, so I do not have any response to the term "null". However, "null" is a programming term that refers to an absence of a value or an empty value. It is often used in programming languages to indicate that a variable does not have a value assigned to it.

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这就是代码 rospy.loginfo("当前进度:%.2f", feedBack, "%")

As an AI language model, I do not have emotions or personal beliefs. Therefore, the concept of "null" is simply a value that represents the absence of a value or a non-existent state. In programming, it is often used to indicate that a variable or an object has not been assigned a value or does not exist.

更正这个Python代码import rospy from mavros_msgs.msg import State from mavros_msgs.srv import CommandBool, SetMode from geometry_msgs.msg import PoseStamped import time current_state = State() def state_cb(msg): global current_state current_state = msg rospy.init_node('position') rate = rospy.Rate(20.0) state_sub = rospy.Subscriber("mavros/state", State, state_cb) local_pos_pub = rospy.Publisher("mavros/setpoint_position/local", PoseStamped, queue_size=10) arming_client = rospy.ServiceProxy("mavros/cmd/arming", CommandBool) set_mode_client = rospy.ServiceProxy("mavros/set_mode", SetMode) wait for FCU connection while not rospy.is_shutdown() and not current_state.connected: rate.sleep() pose = PoseStamped() pose.pose.position.x = 0 pose.pose.position.y = 0 pose.pose.position.z = 1.5 offb_set_mode = SetMode() offb_set_mode.custom_mode = "OFFBOARD" arm_cmd = CommandBool() arm_cmd.value = True state = 3 last_request = rospy.Time.now() while not rospy.is_shutdown() and (rospy.Time.now() - last_request < rospy.Duration(5.0)): if not current_state.armed: if arming_client(arm_cmd) and arm_cmd.response.success: rospy.loginfo("Vehicle armed") if current_state.mode != "OFFBOARD": if set_mode_client(offb_set_mode) and offb_set_mode.response.mode_sent: rospy.loginfo("Offboard enabled") rate.sleep() while state > 0: last_request = rospy.Time.now() while not rospy.is_shutdown() and (rospy.Time.now() - last_request < rospy.Duration(5.0)): pose.pose.position.x = 0 pose.pose.position.y = 0 local_pos_pub.publish(pose) rospy.loginfo("SUCCESS0") rate.sleep() last_request = rospy.Time.now() while not rospy.is_shutdown() and (rospy.Time.now() - last_request < rospy.Duration(5.0)): pose.pose.position.x = 2 pose.pose.position.y = 2 local_pos_pub.publish(pose) rospy.loginfo("SUCCESS1") rate.sleep() state -= 1 rospy.loginfo("state=" + str(state)) offb_set_mode.custom_mode = "AUTO.LAND" if set_mode_client(offb_set_mode) and offb_set_mode.response.mode_sent: rospy.loginfo("AUTO.LAND enabled") last_request = rospy.Time.now() rospy.spin()

这段 Python 代码主要是控制飞行器执行一定的动作。代码中，首先通过导入 rospy、mavros_msgs.msg、mavros_msgs.srv、geometry_msgs.msg 等模块，定义了一些变量和函数。

然后，在 while 循环中，程序会等待与飞控系统的连接建立，之后会设置飞行器的起飞高度为 1.5 米，然后进入一个 while 循环，其中会执行飞行器的上升和向右移动，最后执行自动降落的任务。

其中，offb_set_mode.custom_mode = "OFFBOARD" 会将飞行器的模式设置为 OFFBOARD，arm_cmd.value = True 会将飞行器的电机解锁，local_pos_pub.publish(pose) 会将飞行器的位置信息发布到话题中，set_mode_client(offb_set_mode) 会将飞行器的模式切换为指定的模式，arming_client(arm_cmd) 会将飞行器的电机锁定或解锁。