Python in ROOT 6.22

[Wile_E_Coyote]

Just for reference:

CMake: ROOT component PyROOT is not found

User’s scripts will anyhow need to be modified. The old ROOT versions do not provide “--python2-version” nor “--python3-version”. If “--python-version” returns both versions (ordered, first any 2.x then any 3.x) then the required modifications would be trivial, try e.g.: P="2.7.18 3.8.3"; echo "${P%% *}"; echo "${P##* }" If a user is just interested in python2, instead of “${P}” one just needs to use “${P%% *}”. If a user is just interested in python3, instead of “${P}” one just needs to us…