_validate_outputs() — langchain Function Reference

Architecture documentation for the _validate_outputs() function in base.py from the langchain codebase.

Function python AgentOrchestration ClassicChains called by 2

Entity Profile

AgentOrchestration→ ClassicChains→ _validate_outputs() — langchain Function Reference

Dependency Diagram

graph TD
  e74a56f1_f5d9_1683_0e44_ce6fd51d40b8["_validate_outputs()"]
  f3cef70e_11b0_61c9_7ec0_7308f4b45056["Chain"]
  e74a56f1_f5d9_1683_0e44_ce6fd51d40b8 -->|defined in| f3cef70e_11b0_61c9_7ec0_7308f4b45056
  e60bffb7_c7fe_f9f9_1671_b444e79457ef["prep_outputs()"]
  e60bffb7_c7fe_f9f9_1671_b444e79457ef -->|calls| e74a56f1_f5d9_1683_0e44_ce6fd51d40b8
  73fc6494_3cf5_d143_3c77_a2f6a40c55ed["aprep_outputs()"]
  73fc6494_3cf5_d143_3c77_a2f6a40c55ed -->|calls| e74a56f1_f5d9_1683_0e44_ce6fd51d40b8
  style e74a56f1_f5d9_1683_0e44_ce6fd51d40b8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/chains/base.py lines 311–315

    def _validate_outputs(self, outputs: dict[str, Any]) -> None:
        missing_keys = set(self.output_keys).difference(outputs)
        if missing_keys:
            msg = f"Missing some output keys: {missing_keys}"
            raise ValueError(msg)