_run_output_key() — langchain Function Reference

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

Function python AgentOrchestration ClassicChains

Entity Profile

AgentOrchestration→ ClassicChains→ _run_output_key() — langchain Function Reference

Dependency Diagram

graph TD
  03f356e0_135b_e3d8_c423_2c3ad4897ef8["_run_output_key()"]
  f3cef70e_11b0_61c9_7ec0_7308f4b45056["Chain"]
  03f356e0_135b_e3d8_c423_2c3ad4897ef8 -->|defined in| f3cef70e_11b0_61c9_7ec0_7308f4b45056
  style 03f356e0_135b_e3d8_c423_2c3ad4897ef8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/chains/base.py lines 570–577

    def _run_output_key(self) -> str:
        if len(self.output_keys) != 1:
            msg = (
                f"`run` not supported when there is not exactly "
                f"one output key. Got {self.output_keys}."
            )
            raise ValueError(msg)
        return self.output_keys[0]