ROS学习笔记(0)

系统：Ubuntu20.04

Python环境：Anaconda3

ROS版本：Noetic

1、编译时报错：

CMake Error at /opt/ros/noetic/share/catkin/cmake/empy.cmake:30 (message):
Unable to find either executable 'empy' or Python module 'em'...  try
installing the package 'python3-empy'

原因是系统使用了Anaconda的python环境，但是在conda中没有找到python3-empy包，直接使用conda install python3-empy会报错，找不到安装包。因为python3-empy在附加包中所以应使用命令conda install -c conda-forge empy

2、编译时报错：

ImportError: "from catkin_pkg.package import parse_package" failed: No module named 'catkin_pkg'
Make sure that you have installed "catkin_pkg", it is up to date and on the PYTHONPATH.

原因同1，应使用命令conda install -c conda-forge catkin_make