Trying to install ros: impossible to install rospy [closed]
Hi. I'm trying to install ros.
First of all, I'm on ubuntu 20.04
I tried to install ros melodic, kinetic and finally noetic but the latest was the only one found by my apt-get command. I then installed noetic using aptitude because apt-get had an unsolvable issue of unmeet dependencies.
No I'm trying to run catkin make on git cloned rosjects, bu i encounter the error bellow:
CMake Error at /opt/ros/noetic/share/catkin/cmake/catkinConfig.cmake:83 (find_package):
Could not find a package configuration file provided by "rospy" with any of
the following names:
rospyConfig.cmake
rospy-config.cmake
Add the installation prefix of "rospy" to CMAKE_PREFIX_PATH or set
"rospy_DIR" to a directory containing one of the above files. If "rospy"
provides a separate development package or SDK, be sure it has been
installed.
Call Stack (most recent call first):
openai_ros/openai_ros/CMakeLists.txt:10 (find_package)
I solved it by doing sudo apt-get install ros-noetic-rospy but then I got:
Command 'rosdep' not found, but can be installed with:
sudo apt install python3-rosdep2
So I did the said command "sudo apt install python3-rosdep2", but now I got the first error again (the one about rospy) so I iterated a bit more in this poop loop, by trying to install these packages in another way (I tried sudo apt-get -y install python3-rospy) but I still got this error. How can I solve it ?
You should NOT have packages python3-rospy or python3-rosdep2 installed. The proper solution is to resolve the apt "unmet dependencies" issue. Edit your description and copy/paste this error.
Also provide a link to the instructions you followed to install noetic.
Another thought: to use the binary apt repo, you can NOT have an alternate version of python3 installed in /usr/local/bin/. noetic depends on the python version 3.8.10 installed from apt.