def append_hsv_curve(node_tree=context.scene.node_tree,
                     name='Hue Correct',
                     tone='STANDARD',
                     use_clip=True,
                     clip_min=[0.0, 0.0],
                     clip_max=[1.0, 1.0],
                     extend='EXTRAPOLATED',
                     handle_type='AUTO',
                     black_level=[0.0, 0.0, 0.0],
                     white_level=[1.0, 1.0, 1.0],
                     hue_knots=[[0.0, 0.5],
                                [0.333333, 0.5],
                                [0.666667, 0.5],
                                [1.0, 0.5]],
                     sat_knots=[[0.0, 0.5],
                                [1.0, 0.5]],
                     val_knots=[[0.0, 0.5],
                                [1.0, 0.5]],
                     parent=None,
                     custom_color=None):

    # Set properties.
    curve_node = node_tree.nodes.new('CompositorNodeHueCorrect')
    curve_node.name = name
    curve_node.parent = parent
    if custom_color:
        curve_node.use_custom_color = True
        curve_node.color = custom_color

    # Initialize curve mapping.
    curve_mapping = curve_node.mapping
    collected_knots = [hue_knots, sat_knots, val_knots]
    init_curve_mapping(
        curve_mapping=curve_mapping,
        tone=tone,
        use_clip=use_clip,
        clip_min=clip_min,
        clip_max=clip_max,
        extend=extend,
        handle_type=handle_type,
        black_level=black_level,
        white_level=white_level,
        knots=collected_knots)

    return curve_node