Function validate_output_spec

dash/_validate.py:120–140

This validation is for security and internal debugging, not for users, so the messages are not intended to be clear. `output` comes from the callback definition, `output_spec` from the request.

(output, output_spec, Output)

def validate_output_spec(output, output_spec, Output):
    """
    This validation is for security and internal debugging, not for users,
    so the messages are not intended to be clear.
    `output` comes from the callback definition, `output_spec` from the request.
    """
    if not isinstance(output, (list, tuple)):
        output, output_spec = [output], [output_spec]
    elif len(output) != len(output_spec):
        raise exceptions.CallbackException("Wrong length output_spec")

    for outi, speci in zip(output, output_spec):
        speci_list = speci if isinstance(speci, (list, tuple)) else [speci]
        for specij in speci_list:
            if (
                not Output(specij["id"], clean_property_name(specij["property"]))
                == outi
            ):
                raise exceptions.CallbackException(
                    "Output does not match callback definition"
                )


def validate_and_group_input_args(flat_args, arg_index_grouping):