validate_parsers() — langchain Function Reference

Architecture documentation for the validate_parsers() function in combining.py from the langchain codebase.

Function python OutputParsing StreamingParsers

Entity Profile

OutputParsing→ StreamingParsers→ validate_parsers() — langchain Function Reference

Dependency Diagram

graph TD
  30b537e0_c6e4_d1d0_717a_01191bdcf505["validate_parsers()"]
  69da6100_5867_e2a6_2371_75fe86218762["CombiningOutputParser"]
  30b537e0_c6e4_d1d0_717a_01191bdcf505 -->|defined in| 69da6100_5867_e2a6_2371_75fe86218762
  style 30b537e0_c6e4_d1d0_717a_01191bdcf505 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/output_parsers/combining.py lines 23–36

    def validate_parsers(cls, values: dict[str, Any]) -> dict[str, Any]:
        """Validate the parsers."""
        parsers = values["parsers"]
        if len(parsers) < _MIN_PARSERS:
            msg = "Must have at least two parsers"
            raise ValueError(msg)
        for parser in parsers:
            if parser._type == "combining":  # noqa: SLF001
                msg = "Cannot nest combining parsers"
                raise ValueError(msg)
            if parser._type == "list":  # noqa: SLF001
                msg = "Cannot combine list parsers"
                raise ValueError(msg)
        return values