transform() — langchain Function Reference

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

Function python LangChainCore Runnables calls 2 called by 3

Entity Profile

LangChainCore→ Runnables→ transform() — langchain Function Reference

Dependency Diagram

graph TD
  c0e0035e_3d41_1681_e722_9c0a4ca8826b["transform()"]
  8e601be2_5eac_8426_f30d_f1ed37138bd8["RunnableGenerator"]
  c0e0035e_3d41_1681_e722_9c0a4ca8826b -->|defined in| 8e601be2_5eac_8426_f30d_f1ed37138bd8
  38807d67_690b_db51_4b6a_d357e2a415b0["stream()"]
  38807d67_690b_db51_4b6a_d357e2a415b0 -->|calls| c0e0035e_3d41_1681_e722_9c0a4ca8826b
  b19bb5c5_7d06_0da1_c670_6107a6c35950["transform()"]
  b19bb5c5_7d06_0da1_c670_6107a6c35950 -->|calls| c0e0035e_3d41_1681_e722_9c0a4ca8826b
  b058d203_2f29_f0e0_63cd_7458a119791a["transform()"]
  b058d203_2f29_f0e0_63cd_7458a119791a -->|calls| c0e0035e_3d41_1681_e722_9c0a4ca8826b
  3b190320_b896_da9c_12ee_4d17ddfcf59e["_transform_stream_with_config()"]
  c0e0035e_3d41_1681_e722_9c0a4ca8826b -->|calls| 3b190320_b896_da9c_12ee_4d17ddfcf59e
  b19bb5c5_7d06_0da1_c670_6107a6c35950["transform()"]
  c0e0035e_3d41_1681_e722_9c0a4ca8826b -->|calls| b19bb5c5_7d06_0da1_c670_6107a6c35950
  style c0e0035e_3d41_1681_e722_9c0a4ca8826b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/base.py lines 4327–4342

    def transform(
        self,
        input: Iterator[Input],
        config: RunnableConfig | None = None,
        **kwargs: Any,
    ) -> Iterator[Output]:
        if not hasattr(self, "_transform"):
            msg = f"{self!r} only supports async methods."
            raise NotImplementedError(msg)
        return self._transform_stream_with_config(
            input,
            self._transform,  # type: ignore[arg-type]
            config,
            defers_inputs=True,
            **kwargs,
        )