init() — langchain Function Reference

Architecture documentation for the __init__() function in structured.py from the langchain codebase.

Function python PromptManagement ExampleSelection

Entity Profile

PromptManagement→ ExampleSelection→ __init__() — langchain Function Reference

Dependency Diagram

graph TD
  860d9f0c_4ab4_1325_4192_4e882423b69c["__init__()"]
  14de95af_eb88_e7a8_1ab1_98d03dd541e0["StructuredPrompt"]
  860d9f0c_4ab4_1325_4192_4e882423b69c -->|defined in| 14de95af_eb88_e7a8_1ab1_98d03dd541e0
  style 860d9f0c_4ab4_1325_4192_4e882423b69c fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/structured.py lines 36–72

    def __init__(
        self,
        messages: Sequence[MessageLikeRepresentation],
        schema_: dict | type[BaseModel] | None = None,
        *,
        structured_output_kwargs: dict[str, Any] | None = None,
        template_format: PromptTemplateFormat = "f-string",
        **kwargs: Any,
    ) -> None:
        """Create a structured prompt template.

        Args:
            messages: Sequence of messages.
            schema_: Schema for the structured prompt.
            structured_output_kwargs: Additional kwargs for structured output.
            template_format: Template format for the prompt.

        Raises:
            ValueError: If schema is not provided.
        """
        schema_ = schema_ or kwargs.pop("schema", None)
        if not schema_:
            err_msg = (
                "Must pass in a non-empty structured output schema. Received: "
                f"{schema_}"
            )
            raise ValueError(err_msg)
        structured_output_kwargs = structured_output_kwargs or {}
        for k in set(kwargs).difference(get_pydantic_field_names(self.__class__)):
            structured_output_kwargs[k] = kwargs.pop(k)
        super().__init__(
            messages=messages,
            schema_=schema_,
            structured_output_kwargs=structured_output_kwargs,
            template_format=template_format,
            **kwargs,
        )