def _convert_type_hints_to_json_schema()

in src/smolagents/_function_type_hints_utils.py [0:0]

• 26 lines of code
• 11 McCabe index (conditional complexity)

def _convert_type_hints_to_json_schema(func: Callable, error_on_missing_type_hints: bool = True) -> dict:
    type_hints = get_type_hints(func)
    signature = inspect.signature(func)

    properties = {}
    for param_name, param_type in type_hints.items():
        properties[param_name] = _parse_type_hint(param_type)

    required = []
    for param_name, param in signature.parameters.items():
        if param.annotation == inspect.Parameter.empty and error_on_missing_type_hints:
            raise TypeHintParsingException(f"Argument {param.name} is missing a type hint in function {func.__name__}")
        if param_name not in properties:
            properties[param_name] = {}

        if param.default == inspect.Parameter.empty:
            required.append(param_name)
        else:
            properties[param_name]["nullable"] = True

    # Return: multi‐type union -> treat as any
    if (
        "return" in properties
        and (return_type := properties["return"].get("type"))
        and not isinstance(return_type, str)
    ):
        properties["return"]["type"] = "any"

    schema = {"type": "object", "properties": properties}
    if required:
        schema["required"] = required

    return schema