Function _initialize_context

dash/_callback.py:364–386

Initialize context and validate output specifications.

(args, kwargs, inputs_state_indices, has_output, insert_output)

def _initialize_context(args, kwargs, inputs_state_indices, has_output, insert_output):
    """Initialize context and validate output specifications."""
    app = kwargs.pop("app", None)
    output_spec = kwargs.pop("outputs_list")
    callback_ctx = kwargs.pop("callback_context", AttributeDict({"updated_props": {}}))
    context_value.set(callback_ctx)
    original_packages = set(ComponentRegistry.registry)

    if has_output:
        _validate.validate_output_spec(insert_output, output_spec, Output)

    func_args, func_kwargs = _validate.validate_and_group_input_args(
        args, inputs_state_indices
    )
    return (
        output_spec,
        callback_ctx,
        func_args,
        func_kwargs,
        app,
        original_packages,
        False,
    )


def _get_callback_manager(