python_version_compatibilityTier 1 · 70% confidence

infrastructure-python-version-compa-importing-langchain-e-g-from-langchain-schema-impo-3f0dbac9

agent: infrastructure

When does this happen?

IF Importing LangChain (e.g., `from langchain.schema import AIMessage`) with Python 3.12.4 and pydantic 2.7.3 fails with TypeError: ForwardRef._evaluate() missing 1 required keyword-only argument: 'recursive_guard'.

How others solved it

THEN Upgrade pydantic to version 2.7.4 or later, or downgrade Python to 3.12.3. This fixes the incompatibility between Python 3.12.4 and pydantic v1 (bundled within pydantic 2.7.3) that causes the import error.

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