_transform() — langchain Function Reference

Architecture documentation for the _transform() function in passthrough.py from the langchain codebase.

Function python LangChainCore Runnables calls 2 called by 1

Entity Profile

LangChainCore→ Runnables→ _transform() — langchain Function Reference

Dependency Diagram

graph TD
  ce4d1e34_3bb5_37f8_6976_fc0c99c23892["_transform()"]
  8b44d2a6_6c89_4ea1_b8c7_64e60123bbbe["RunnablePick"]
  ce4d1e34_3bb5_37f8_6976_fc0c99c23892 -->|defined in| 8b44d2a6_6c89_4ea1_b8c7_64e60123bbbe
  a51fc650_dd24_4986_7118_5682f1932c8b["_transform()"]
  a51fc650_dd24_4986_7118_5682f1932c8b -->|calls| ce4d1e34_3bb5_37f8_6976_fc0c99c23892
  3a36dbf6_6c2b_7362_1ddb_d7fe56086df3["_pick()"]
  ce4d1e34_3bb5_37f8_6976_fc0c99c23892 -->|calls| 3a36dbf6_6c2b_7362_1ddb_d7fe56086df3
  a51fc650_dd24_4986_7118_5682f1932c8b["_transform()"]
  ce4d1e34_3bb5_37f8_6976_fc0c99c23892 -->|calls| a51fc650_dd24_4986_7118_5682f1932c8b
  style ce4d1e34_3bb5_37f8_6976_fc0c99c23892 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/passthrough.py lines 780–787

    def _transform(
        self,
        chunks: Iterator[dict[str, Any]],
    ) -> Iterator[Any]:
        for chunk in chunks:
            picked = self._pick(chunk)
            if picked is not None:
                yield picked