[Bug]: pydantic 2.10.0 breaks mp-api

[SiLiKhon]

Code snippet

### on google colab: 
# !pip uninstall -y pydantic pydantic_core
# !pip install mp-api  # observe that pydantic-2.10.0 gets installed

from mp_api.client import MPRester

with MPRester("...") as mpr:
    docs = mpr.materials.summary.search(material_ids=["mp-950995"])

What happened?

1. install mp-api in a clean environment
2. for some reason, pydantic 2.10.0 gets installed as a dependency
3. broken mp-api

Version

0.42.2

Which OS?

• MacOS
• Windows
• Linux

Log output

/usr/local/lib/python3.10/dist-packages/mp_api/client/core/client.py in _generate_returned_model(self, doc)
   1073         )
   1074 
-> 1075         data_model.model_fields = {
   1076             **{
   1077                 name: description

AttributeError: can't set attribute 'model_fields'

[saj3sh]

i am also getting same issue

[SiLiKhon]

Note: downgrading back to pydantic==2.9.2 should fix the issue (at least, with mp-api==0.42.2)

[PythonFZ]

Can replicate as well

[tschaume]

@SiLiKhon @saj3sh @PythonFZ I just pushed a release candidate to PyPI: https://pypi.org/project/mp-api/0.43.0rc1/. Give it a try and let me know if you notice any issues. Thanks!

[SiLiKhon]

Thanks @tschaume !
I tried !pip install mp-api==0.43.0rc1 on colab, and it works fine with both new pydantic 2.10.0 and 2.10.1.

[tschaume]

Thanks @SiLiKhon. I just pushed out a new release v0.43.0 (same as v0.43.0rc1)