File "/opt/ros/kinetic/bin/roslaunch", line 34, in <module> - ImportError: No module named roslaunch

File "/opt/ros/kinetic/bin/roslaunch", line 34, in <module> - ImportError: No module named roslaunch

使用 roslaunch 时,ROS Ubuntu 16 lts 出现以下错误:

文件“/opt/ros/kinetic/bin/roslaunch”,第 34 行,在 - 导入错误中:没有名为 roslaunch 的模块

我使用了以下命令: 来源 ./devel/setup.bash