Python Roslaunch got“；没有这样的文件或目录；启动节点时

我正在为用python编写的ROS创建自己的节点。启动节点时

roslaunch contact\u charging contact\u charging.launch

出现以下错误：

Roslaunch got a 'No such file or directory' error while attempting to run:
/home/ubuntu/catkin_ws/src/contact_charging/nodes/contact_charging.py __name:=contact_charging __log:=/home/ubuntu/.ros/log/709588cc-7a39-11ea-9bb6-77211eadb622/contact_charging-5.log
Please make sure that all the executables in this command exist and have
executable permission. This is often caused by a bad launch-prefix.
The traceback for the exception was written to the log file

启动文件/src/contact\u charging/launch/contact\u charging.launch:

Python脚本位于/src/contact\u charging/nodes/contact\u charging.py中

到目前为止，我尝试的是：

chmod 777/接触式充电器-R

多次制作柳絮并重新启动机器/终端

已在根文件夹中创建setup.py

---

pkg存在吗？您编写了

chmod 777/contact\u charger-R

，但您的软件包名为

contact\u charging

。您可以再次检查您的可执行文件是否具有正确的权限：

roscd contact\u；ls-l节点/联系人_charging.py

。如果没有，请使用

chmod+x节点/contact\u charging.py

进行设置，然后尝试仅使用

rosrun contact\u charging contact\u charging.py运行节点
<launch>

    <include file="$(find magni_nav)/launch/move_basic.launch"/>
    <include file="$(find magni_description)/launch/description.launch"/>
    <include file="$(find raspicam_node)/launch/camerav2_1280x960.launch" />


    <node pkg="contact_charging" type="contact_charging.py" name="contact_charging" output="screen"></node>

</launch>