_diff() — langchain Function Reference

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

Function python OutputParsing StreamingParsers called by 1

Entity Profile

OutputParsing→ StreamingParsers→ _diff() — langchain Function Reference

Dependency Diagram

graph TD
  384cee5b_46cc_97df_297f_6b4f798bb585["_diff()"]
  cd116ff8_eeee_c962_fbf2_a4040e45e224["BaseCumulativeTransformOutputParser"]
  384cee5b_46cc_97df_297f_6b4f798bb585 -->|defined in| cd116ff8_eeee_c962_fbf2_a4040e45e224
  2008ec55_bc9f_147f_6d4b_6628aad4262f["_transform()"]
  2008ec55_bc9f_147f_6d4b_6628aad4262f -->|calls| 384cee5b_46cc_97df_297f_6b4f798bb585
  style 384cee5b_46cc_97df_297f_6b4f798bb585 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/output_parsers/transform.py lines 107–123

    def _diff(
        self,
        prev: T | None,
        next: T,  # noqa: A002
    ) -> T:
        """Convert parsed outputs into a diff format.

        The semantics of this are up to the output parser.

        Args:
            prev: The previous parsed output.
            next: The current parsed output.

        Returns:
            The diff between the previous and current parsed output.
        """
        raise NotImplementedError