_is_directly_injected_arg_type() — langchain Function Reference

Source Code

libs/core/langchain_core/tools/base.py lines 1422–1439

def _is_directly_injected_arg_type(type_: Any) -> bool:
    """Check if a type annotation indicates a directly injected argument.

    This is currently only used for `ToolRuntime`.

    Checks if either the annotation itself is a subclass of `_DirectlyInjectedToolArg`
    or the origin of the annotation is a subclass of `_DirectlyInjectedToolArg`.

    For example, `ToolRuntime` or `ToolRuntime[ContextT, StateT]` would both return
    `True`.
    """
    return (
        isinstance(type_, type) and issubclass(type_, _DirectlyInjectedToolArg)
    ) or (
        (origin := get_origin(type_)) is not None
        and isinstance(origin, type)
        and issubclass(origin, _DirectlyInjectedToolArg)
    )