[langchain-tests] Python 3.14: `pydantic.v1.errors.ConfigError: unable to infer type for attribute "name"`

[amotl]

Checked other resources

• This is a feature request, not a bug report or usage question.
• I added a clear and descriptive title that summarizes the feature request.
• I used the GitHub search to find a similar feature request and didn't find it.
• I checked the LangChain documentation and API reference to see if this feature already exists.
• This is not related to the langchain-community package.

Package (Required)

• langchain-tests

Feature Description

Support Python 3.14.

Use Case

When updating to Python 3.14, we observe this error on our CI. It is raised when calling generate_schema_pydantic_v1_from_2() in langchain_tests/unit_tests/chat_models.py.

pydantic.v1.errors.ConfigError: unable to infer type for attribute "name"

-- https://github.com/crate/langchain-cratedb/actions/runs/20115392189/job/57723468334?pr=76#step:6:114

References

• CI: Use Python 3.14 across the board crate/langchain-cratedb#76

[Aaryan-549]

Hi, I would like to work on this.

Approach:
I will investigate the generate_schema_pydantic_v1_from_2 function in langchain_tests/unit_tests/chat_models.py to understand why Python 3.14's introspection is causing pydantic.v1 to fail on type inference for the "name" attribute. My plan is to:

1. Set up a local environment with the Python 3.14 pre-release to reproduce the ConfigError.
2. Determine if the issue stems from changes in typing or class creation in Python 3.14.
3. Apply a fix, which will likely involve making the attribute typing explicit in the model definition or adjusting the schema generation utility to handle the new behavior.

Could you please assign this to me?

[amotl]

Thank you for apparently resolving this swiftly, @mdrxy. 🙇

[amotl]

Our CI succeeds on Python 3.14 now when using the most recent langchain-tests package. Thank you again!

• CI: Use Python 3.14 across the board crate/langchain-cratedb#76
• Chore(deps-dev): Update langchain-tests requirement from ==1.1.0 to ==1.1.1 crate/langchain-cratedb#81