PydanticImportError: BaseSettings has been moved to the pydantic-settings

[janosh]

pymatgen CI is failing with:

E pydantic.errors.PydanticImportError: BaseSettings has been moved to the pydantic-settings package.
See https://docs.pydantic.dev/2.0/migration/#basesettings-has-moved-to-pydantic-settings for more details.

Came up in materialsproject/pymatgen#3122.

[peikai]

Encountering the same issue.

pydantic.errors.PydanticImportError: BaseSettings has been moved to the pydantic-settings package.
See https://docs.pydantic.dev/2.0/migration/#basesettings-has-moved-to-pydantic-settings for more details.

Besides, PyObject class (used in emmet/core/settings.py) has been deprecated from the pydantic v2.

[janosh]

See materialsproject/pymatgen@1e90254 for tmp fix

[peikai]

Thanks!

[munrojm]

I added pydantic < 2.0 to the emmet-core dependencies in #770.

[janosh]

Thanks @munrojm.

Other MP repos might make the transition to pydantic v2 soonish (how about atomate2 @utf?). Might require some coordination to minimize the time of clashing deps.

[Andrew-S-Rosen]

I am strongly in favor of this! 😄

[mkhorton]

Agreed. Also linking the jobflow dependabot:

materialsproject/jobflow#370

It would be good to have a strategy. I'd like to migrate myself, although I've been using another third-party library recently that's also pinned on pydantic<2.0.0 so anticipating a little pain (although looks like they're merging in support soon).

[mkhorton]

They are offering a bump-pydantic tool which might help https://docs.pydantic.dev/2.0/migration/#code-transformation-tool

[Andrew-S-Rosen]

@munrojm looks like this can be closed?