How much do I have to uninstall to go from python2 to python3

ROOT
5

Oh ok, thanks I hadn’t realised that was a step needed.

So, for completeness if someone wanted to set up from git with python3 they would do;

$ git clone https://github.com/root-project/root.git
$ mkdir buildDir
$ cd buildDir
$ cmake -Dpython_version=3 ../root
$ cmake --build . --target install

If they already had a version of ROOT and wanted to change it from python2 to python3 this might work;

$ cd buildDir
$ cmake -DPYTHON_EXECUTABLE=/path/to/desired/python ../root

$ rm -r …/root/bindings

$ cmake --build . --target install

Does that look right?