_parse_obj() — langchain Function Reference

Architecture documentation for the _parse_obj() function in pydantic.py from the langchain codebase.

Function python OutputParsing StructuredValidation calls 2 called by 2

Entity Profile

OutputParsing→ StructuredValidation→ _parse_obj() — langchain Function Reference

Dependency Diagram

graph TD
  fd96632b_d191_0274_eb13_17083eb19c1d["_parse_obj()"]
  570792b6_910c_5259_8419_5183ac1b1409["PydanticOutputParser"]
  fd96632b_d191_0274_eb13_17083eb19c1d -->|defined in| 570792b6_910c_5259_8419_5183ac1b1409
  fd96632b_d191_0274_eb13_17083eb19c1d["_parse_obj()"]
  fd96632b_d191_0274_eb13_17083eb19c1d -->|calls| fd96632b_d191_0274_eb13_17083eb19c1d
  832ab0e8_f54d_dc1d_0342_eccf5c13bd0d["parse_result()"]
  832ab0e8_f54d_dc1d_0342_eccf5c13bd0d -->|calls| fd96632b_d191_0274_eb13_17083eb19c1d
  be3b196e_4a79_f447_3f29_9d15eee5575b["_parser_exception()"]
  fd96632b_d191_0274_eb13_17083eb19c1d -->|calls| be3b196e_4a79_f447_3f29_9d15eee5575b
  fd96632b_d191_0274_eb13_17083eb19c1d["_parse_obj()"]
  fd96632b_d191_0274_eb13_17083eb19c1d -->|calls| fd96632b_d191_0274_eb13_17083eb19c1d
  style fd96632b_d191_0274_eb13_17083eb19c1d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/output_parsers/pydantic.py lines 25–35

    def _parse_obj(self, obj: dict) -> TBaseModel:
        try:
            if issubclass(self.pydantic_object, pydantic.BaseModel):
                return self.pydantic_object.model_validate(obj)
            if issubclass(self.pydantic_object, pydantic.v1.BaseModel):
                return self.pydantic_object.parse_obj(obj)
            msg = f"Unsupported model version for PydanticOutputParser: \
                        {self.pydantic_object.__class__}"
            raise OutputParserException(msg)
        except (pydantic.ValidationError, pydantic.v1.ValidationError) as e:
            raise self._parser_exception(e, obj) from e