Could not detect a supported package manager from the followings list: ['PORTAGE', 'RPM', 'PKG', 'APT'], or the required PYTHON library is not installed. Check warnings for details.
1. Check if you got a package manager.
2. You have to install python3 with 'yum install python3' and then create a symlink from python to python3 with 'update-alternatives --config python'.