Hi @shudson ,
this is what I did:
$ mamba create -n test-spyder -c conda-forge root spyder python=3
$ mamba activate test-spyder
(test-spyder) $ spyder
and it seems to work (i.e. I can import ROOT from spyder).
Creating a new environment with only and all the packages you need is usually simpler than having one giant environment that you keep installing things into – eventually there might be conflicts.
(mamba is just a faster conda – that you can install from conda itself).
Cheers,
Enrico