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_infer_arg_descriptions() — langchain Function Reference

Architecture documentation for the _infer_arg_descriptions() function in base.py from the langchain codebase.

Function python AgentOrchestration ToolInterface calls 3 called by 1

Entity Profile

Dependency Diagram

graph TD
  1a23ba05_08c6_e278_462c_5ad74643f2c9["_infer_arg_descriptions()"]
  80cebff4_efbd_4311_85e9_de0dc81a7eee["base.py"]
  1a23ba05_08c6_e278_462c_5ad74643f2c9 -->|defined in| 80cebff4_efbd_4311_85e9_de0dc81a7eee
  ce65f72d_5a31_1cf5_28d0_0114514b29b5["create_schema_from_function()"]
  ce65f72d_5a31_1cf5_28d0_0114514b29b5 -->|calls| 1a23ba05_08c6_e278_462c_5ad74643f2c9
  8d8fb0ce_9186_8b62_ef81_625850eda075["_parse_python_function_docstring()"]
  1a23ba05_08c6_e278_462c_5ad74643f2c9 -->|calls| 8d8fb0ce_9186_8b62_ef81_625850eda075
  fb3bc5b8_42ae_d4d9_5379_496d34d8490f["_validate_docstring_args_against_annotations()"]
  1a23ba05_08c6_e278_462c_5ad74643f2c9 -->|calls| fb3bc5b8_42ae_d4d9_5379_496d34d8490f
  9844b114_d1bc_aba8_a452_29f3abc0d0a8["_get_annotation_description()"]
  1a23ba05_08c6_e278_462c_5ad74643f2c9 -->|calls| 9844b114_d1bc_aba8_a452_29f3abc0d0a8
  style 1a23ba05_08c6_e278_462c_5ad74643f2c9 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tools/base.py lines 196–227

def _infer_arg_descriptions(
    fn: Callable,
    *,
    parse_docstring: bool = False,
    error_on_invalid_docstring: bool = False,
) -> tuple[str, dict]:
    """Infer argument descriptions from function docstring and annotations.

    Args:
        fn: The function to infer descriptions from.
        parse_docstring: Whether to parse the docstring for descriptions.
        error_on_invalid_docstring: Whether to raise error on invalid docstring.

    Returns:
        A tuple containing the function description and argument descriptions.
    """
    annotations = typing.get_type_hints(fn, include_extras=True)
    if parse_docstring:
        description, arg_descriptions = _parse_python_function_docstring(
            fn, annotations, error_on_invalid_docstring=error_on_invalid_docstring
        )
    else:
        description = inspect.getdoc(fn) or ""
        arg_descriptions = {}
    if parse_docstring:
        _validate_docstring_args_against_annotations(arg_descriptions, annotations)
    for arg, arg_type in annotations.items():
        if arg in arg_descriptions:
            continue
        if desc := _get_annotation_description(arg_type):
            arg_descriptions[arg] = desc
    return description, arg_descriptions

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Frequently Asked Questions

What does _infer_arg_descriptions() do?
_infer_arg_descriptions() is a function in the langchain codebase, defined in libs/core/langchain_core/tools/base.py.
Where is _infer_arg_descriptions() defined?
_infer_arg_descriptions() is defined in libs/core/langchain_core/tools/base.py at line 196.
What does _infer_arg_descriptions() call?
_infer_arg_descriptions() calls 3 function(s): _get_annotation_description, _parse_python_function_docstring, _validate_docstring_args_against_annotations.
What calls _infer_arg_descriptions()?
_infer_arg_descriptions() is called by 1 function(s): create_schema_from_function.

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