catkin_make出现 No module named 'catkin_pkg'

从错误输出中：

Make sure that you have installed "catkin_pkg", it is up to date and on the PYTHONPATH.

尝试查找catkin_pkg并检查你的PYTHONPATH。catkin_pkg不在我的PYTHONPATH中（可能是由于其他程序安装），所以我添加了它并且再次运行catkin_make，这次成功。

~/catkin_ws$ locate catkin_pkg
/usr/lib/python2.7/dist-packages/catkin_pkg

~/catkin_ws$ echo $PYTHONPATH
/opt/ros/kinetic/lib/python2.7/dist-packages

将catkin_pkg dir附加到PYTHONPATH（用于此会话）：

~/catkin_ws$ export PYTHONPATH=$PYTHONPATH:/usr/lib/python2.7/dist-packages

为了永久性，我将catkin_pkg dir附加到我的.bashrc中的PYTHONPATH中（可能需要先备份你的.bashrc文件，例如cp -p〜/ .bashrc〜/ .bashrc-ros-catkin.bak）。

为此，请编辑〜/ .bashrc文件（你可能需要使用sudo编辑此文件），并将以下两行添加到文件末尾：

# manually added for ROS catkin_make workspace setup
export PYTHONPATH=$PYTHONPATH:/usr/lib/python2.7/dist-packages

保存文件并运行源以更新你的会话：

~/catkin_ws$ source ~/.bashrc

再次检查你的PYTHONPATH：

~/catkin_ws$ echo $PYTHONPATH
/opt/ros/kinetic/lib/python2.7/dist-packages:/usr/lib/python2.7/dist-packages

来源：CSDN

作者：jiangbohan789

链接：https://blog.csdn.net/jiangbohan789/article/details/104072084