WIP: Vasp ml

[davidwaroquiers]

Summary

Adding Vasp ML functionality in MultiMDMaker.
Also added possibility to rename additioal vasp files within copy_vasp_outputs (needed to allow ML_ABN=>ML_AB and ML_FFN=>ML_FF)

• New MLMDMaker
• MLFF feature within MultiMDMaker (as a classmethod)
• Fixed split of nsteps and temperatures in MultiMDMaker
• MLMDSetGenerator
• Possibilty to rename additional vasp files after they have been copied (by providing a dict instead of a list).

Additional dependencies introduced (if any)

None

TODO (if any)

If this is a work-in-progress, write something about what else needs to be done.

• Tests

Checklist

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[davidwaroquiers]

@ml-evs As we discussed about using that, could you try this implementation ?
@gpetretto Comments ?

Still more features to be added in the MultiMDMaker (train+run, refit, ...)

[davidwaroquiers]

This PR needs (at least) this to be merged in pymatgen: materialsproject/pymatgen#3625
the ML_MODE tag in vasp is not recognized when its value is capitalized. E.g. ML_MODE = Train does not work. Pymatgen currently capitalizes all strings (e.g. ALGO = Fast, even if you set incar["ALGO"] = "fast").

[davidwaroquiers]

This PR also needs the following PR to be merged in emmet: materialsproject/emmet#939

[davidwaroquiers]

Pinging @utf to get your opinion on this draft, especially in terms of the input sets for which I added some option to disable band structure parsing (this should obviously be moved to pymatgen anyway to the new input sets there).

[utf]

Hi @davidwaroquiers, appologies for the delay looking at this. This looks good to me, except the part about the band gap handling. These seems quite heavy handed. I wonder if the input sets can just check for the band gap and if there is an error then just set a default value. I.e., this is all handled in the input set generator entirely, without needing to make changes in other files.

I think this workflow will also need to be updated to use the latest input sets in pymatgen once #854 is merged.

[davidwaroquiers]

Hi @davidwaroquiers, appologies for the delay looking at this. This looks good to me, except the part about the band gap handling. These seems quite heavy handed. I wonder if the input sets can just check for the band gap and if there is an error then just set a default value. I.e., this is all handled in the input set generator entirely, without needing to make changes in other files.

I think this workflow will also need to be updated to use the latest input sets in pymatgen once #854 is merged.

Thanks @utf ! No worries about the delay! I've seen #854 has been merged so I'll work this out when I'm back from holidays. Indeed the band gap thing is a bit clunky... I will see how to do that in a cleaner way.