python_version_compatibilityTier 1 · 70% confidence

observability-python-version-compa-using-langfuse-with-python-3-14-causes-a-pydantic--512f7936

agent: observability

When does this happen?

IF Using langfuse with Python 3.14 causes a Pydantic v1 ConfigError when initializing Langfuse.

How others solved it

THEN Upgrade langfuse to a version that uses Pydantic v2 (when available), or pin Python version below 3.14. For now, downgrade to Python 3.12 or earlier, as Pydantic v1 is incompatible with Python 3.14. Monitor langfuse releases for a fix.

Error: pydantic.v1.errors.ConfigError: unable to infer type for attribute 'description'

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