user: What is Index – U and how is it used in Blender Python scripting?

assistant: ttribute)](bpy.types.SequenceEditor.html#bpy.types.SequenceEditor.use_overlay_frame_lock) - [use_overlay_smooth_wire (bpy.types.PreferencesSystem attribute)](bpy.types.PreferencesSystem.html#bpy.types.PreferencesSystem.use_overlay_smooth_wire) - [use_override_solver_iterations (bpy.types.RigidBodyConstraint attribute)](bpy.types.RigidBodyConstraint.html#bpy.types.RigidBodyConstraint.use_override_solver_iterations) - [use_overscan (bpy.types.SceneEEVEE attribute)](bpy.types.SceneEEVEE.html#bpy.types.SceneEEVEE.use_overscan) - [use_overwrite (bpy.types.RenderSettings attribute)](bpy.types.RenderSettings.html#bpy.types.RenderSettings.use_overwrite)   - [(bpy.types.SpaceTextEditor attribute)](bpy.types.SpaceTextEditor.html#bpy.types.SpaceTextEditor.use_overwrite)   - [(bpy.types.StripProxy attribute)](bpy.types.StripProxy.html#bpy.types.StripProxy.use_overwrite) - [use_paint_antialiasing (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_antialiasing) - [use_paint_bone_selection (bpy.types.Mesh attribute)](bpy.types.Mesh.html#bpy.types.Mesh.use_paint_bone_selection) - [use_paint_erase (bpy.types.DynamicPaintBrushSettings attribute)](bpy.types.DynamicPaintBrushSettings.html#bpy.types.DynamicPaintBrushSettings.use_paint_erase) - [use_paint_grease_pencil (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_grease_pencil) - [use_paint_image (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_image) - [use_paint_mask (bpy.types.Mesh attribute)](bpy.types.Mesh.html#bpy.types.Mesh.use_paint_mask) - [use_paint_mask_vertex (bpy.types.Mesh attribute)](bpy.types.Mesh.html#bpy.types.Mesh.use_paint_mask_vertex) - [use_paint_sculpt (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_sculpt) - [use_paint_sculpt_curves (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_sculpt_curves) - [use_paint_uv_sculpt (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_uv_sculpt) - [use_paint_vertex (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_vertex) - [use_paint_weight (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_paint_weight) - [use_parent_final_indices (bpy.types.Object attribute)](bpy.types.Object.html#bpy.types.Object.use_parent_final_indices) - [use_parent_particles (bpy.types.ParticleSettings attribute)](bpy.types.ParticleSettings.html#bpy.types.ParticleSettings.use_parent_particles) - [use_particle_kill (bpy.types.CollisionSettings attribute)](bpy.types.CollisionSettings.html#bpy.types.CollisionSettings.use_particle_kill) - [use_particle_radius (bpy.types.DynamicPaintBrushSettings attribute)](bpy.types.DynamicPaintBrushSettings.html#bpy.types.DynamicPaintBrushSettings.use_particle_radius) - [use_particle_size (bpy.types.FluidFlowSettings attribute)](bpy.types.FluidFlowSettings.html#bpy.types.FluidFlowSettings.use_particle_size) - [use_pass_ambient_occlusion (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_ambient_occlusion) - [use_pass_bloom (bpy.types.ViewLayerEEVEE attribute)](bpy.types.ViewLayerEEVEE.html#bpy.types.ViewLayerEEVEE.use_pass_bloom) - [use_pass_color (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_color) - [use_pass_combined (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_combined) - [use_pass_cryptomatte_accurate (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_cryptomatte_accurate) - [use_pass_cryptomatte_asset (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_cryptomatte_asset) - [use_pass_cryptomatte_material (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_cryptomatte_material) - [use_pass_cryptomatte_object (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_cryptomatte_object) - [use_pass_diffuse (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_diffuse) - [use_pass_diffuse_color (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_diffuse_color) - [use_pass_diffuse_direct (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_diffuse_direct) - [use_pass_diffuse_indirect (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_diffuse_indirect) - [use_pass_direct (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_direct) - [use_pass_emit (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_emit)   - [(bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_emit) - [use_pass_environment (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_environment) - [use_pass_glossy (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_glossy) - [use_pass_glossy_color (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_glossy_color) - [use_pass_glossy_direct (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_glossy_direct) - [use_pass_glossy_indirect (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_glossy_indirect) - [use_pass_grease_pencil (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_grease_pencil) - [use_pass_indirect (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_indirect) - [use_pass_material_index (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_material_index) - [use_pass_mist (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_mist) - [use_pass_normal (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_normal) - [use_pass_object_index (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_object_index) - [use_pass_position (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_position) - [use_pass_shadow (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_shadow) - [use_pass_subsurface_color (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_subsurface_color) - [use_pass_subsurface_direct (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_subsurface_direct) - [use_pass_subsurface_indirect (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_subsurface_indirect) - [use_pass_transmission (bpy.types.BakeSettings attribute)](bpy.types.BakeSettings.html#bpy.types.BakeSettings.use_pass_transmission) - [use_pass_transmission_color (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_transmission_color) - [use_pass_transmission_direct (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_transmission_direct) - [use_pass_transmission_indirect (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_transmission_indirect) - [use_pass_transparent (bpy.types.ViewLayerEEVEE attribute)](bpy.types.ViewLayerEEVEE.html#bpy.types.ViewLayerEEVEE.use_pass_transparent) - [use_pass_uv (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_uv) - [use_pass_vector (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_vector) - [use_pass_volume_direct (bpy.types.ViewLayerEEVEE attribute)](bpy.types.ViewLayerEEVEE.html#bpy.types.ViewLayerEEVEE.use_pass_volume_direct) - [use_pass_z (bpy.types.ViewLayer attribute)](bpy.types.ViewLayer.html#bpy.types.ViewLayer.use_pass_z) - [use_path (bpy.types.Curve attribute)](bpy.types.Curve.html#bpy.types.Curve.use_path)   - [(bpy.types.ParticleInstanceModifier attribute)](bpy.types.ParticleInstanceModifier.html#bpy.types.ParticleInstanceModifier.use_path) - [use_path_clamp (bpy.types.Curve attribute)](bpy.types.Curve.html#bpy.types.Curve.use_path_clamp) - [use_path_follow (bpy.types.Curve attribute)](bpy.types.Curve.html#bpy.types.Curve.use_path_follow) - [use_percentage (bpy.types.GreasePencilBuildModifier attribute)](bpy.types.GreasePencilBuildModifier.html#bpy.types.GreasePencilBuildModifier.use_percentage) - [use_persistent (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_persistent) - [use_persistent_data (bpy.types.RenderSettings attribute)](bpy.types.RenderSettings.html#bpy.types.RenderSettings.use_persistent_data) - [use_pin (bpy.types.ActionGroup attribute)](bpy.types.ActionGroup.html#bpy.types.ActionGroup.use_pin)   - [(bpy.types.AnimData attribute)](bpy.types.AnimData.html#bpy.types.AnimData.use_pin)   - [(bpy.types.Panel attribute)](bpy.types.Panel.html#bpy.types.Panel.use_pin) - [use_pin_boundary (bpy.types.CorrectiveSmoothModifier attribute)](bpy.types.CorrectiveSmoothModifier.html#bpy.types.CorrectiveSmoothModifier.use_pin_boundary) - [use_pin_id (bpy.types.SpaceProperties attribute)](bpy.types.SpaceProperties.html#bpy.types.SpaceProperties.use_pin_id) - [use_pin_scene (bpy.types.WorkSpace attribute)](bpy.types.WorkSpace.html#bpy.types.WorkSpace.use_pin_scene) - [use_pin_to_last (bpy.types.Modifier attribute)](bpy.types.Modifier.html#bpy.types.Modifier.use_pin_to_last) - [use_pixel_size (bpy.types.ShaderNodeWireframe attribute)](bpy.types.ShaderNodeWireframe.html#bpy.types.ShaderNodeWireframe.use_pixel_size) - [use_placeholder (bpy.types.RenderSettings attribute)](bpy.types.RenderSettings.html#bpy.types.RenderSettings.use_placeholder) - [use_plane_init (bpy.types.FluidEffectorSettings attribute)](bpy.types.FluidEffectorSettings.html#bpy.types.FluidEffectorSettings.use_plane_init)   - [(bpy.types.FluidFlowSettings attribute)](bpy.types.FluidFlowSettings.html#bpy.types.FluidFlowSettings.use_plane_init) - [use_plane_trim (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_plane_trim) - [use_play_3d_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_3d_editors) - [use_play_animation_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_animation_editors) - [use_play_clip_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_clip_editors) - [use_play_image_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_image_editors) - [use_play_node_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_node_editors) - [use_play_properties_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_properties_editors) - [use_play_sequence_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_sequence_editors) - [use_play_spreadsheet_editors (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_spreadsheet_editors) - [use_play_top_left_3d_editor (bpy.types.Screen attribute)](bpy.types.Screen.html#bpy.types.Screen.use_play_top_left_3d_editor) - [use_point_count_interpolate (bpy.types.BrushCurvesSculptSettings attribute)](bpy.types.BrushCurvesSculptSettings.html#bpy.types.BrushCurvesSculptSettings.use_point_count_interpolate) - [use_pole_merge (bpy.types.CameraStereoData attribute)](bpy.types.CameraStereoData.html#bpy.types.CameraStereoData.use_pole_merge) - [use_poly_data (bpy.types.DataTransferModifier attribute)](bpy.types.DataTransferModifier.html#bpy.types.DataTransferModifier.use_poly_data) - [use_pose_ik_anchored (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pose_ik_anchored) - [use_pose_lock_rotation (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pose_lock_rotation) - [use_positional_tracking (bpy.types.XrSessionSettings attribute)](bpy.types.XrSessionSettings.html#bpy.types.XrSessionSettings.use_positional_tracking) - [use_positive_direction (bpy.types.GreasePencilShrinkwrapModifier attribute)](bpy.types.GreasePencilShrinkwrapModifier.html#bpy.types.GreasePencilShrinkwrapModifier.use_positive_direction)   - [(bpy.types.ShrinkwrapModifier attribute)](bpy.types.ShrinkwrapModifier.html#bpy.types.ShrinkwrapModifier.use_positive_direction) - [use_predict (bpy.types.BoidRuleAvoid attribute)](bpy.types.BoidRuleAvoid.html#bpy.types.BoidRuleAvoid.use_predict)   - [(bpy.types.BoidRuleGoal attribute)](bpy.types.BoidRuleGoal.html#bpy.types.BoidRuleGoal.use_predict) - [use_preferences_save (bpy.types.Preferences attribute)](bpy.types.Preferences.html#bpy.types.Preferences.use_preferences_save) - [use_prefetch (bpy.types.SequenceEditor attribute)](bpy.types.SequenceEditor.html#bpy.types.SequenceEditor.use_prefetch) - [use_premultiply (bpy.types.DynamicPaintSurface attribute)](bpy.types.DynamicPaintSurface.html#bpy.types.DynamicPaintSurface.use_premultiply) - [use_preserve_length (bpy.types.ParticleEdit attribute)](bpy.types.ParticleEdit.html#bpy.types.ParticleEdit.use_preserve_length) - [use_preserve_root (bpy.types.ParticleEdit attribute)](bpy.types.ParticleEdit.html#bpy.types.ParticleEdit.use_preserve_root) - [use_preserve_shape (bpy.types.ParticleInstanceModifier attribute)](bpy.types.ParticleInstanceModifier.html#bpy.types.ParticleInstanceModifier.use_preserve_shape) - [use_pressure (bpy.types.BrushGpencilSettings attribute)](bpy.types.BrushGpencilSettings.html#bpy.types.BrushGpencilSettings.use_pressure)   - [(bpy.types.ClothSettings attribute)](bpy.types.ClothSettings.html#bpy.types.ClothSettings.use_pressure) - [use_pressure_area_radius (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pressure_area_radius) - [use_pressure_jitter (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pressure_jitter) - [use_pressure_masking (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pressure_masking) - [use_pressure_radius (bpy.types.CurvePaintSettings attribute)](bpy.types.CurvePaintSettings.html#bpy.types.CurvePaintSettings.use_pressure_radius) - [use_pressure_size (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pressure_size) - [use_pressure_spacing (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pressure_spacing) - [use_pressure_strength (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_pressure_strength) - [use_pressure_volume (bpy.types.ClothSettings attribute)](bpy.types.ClothSettings.html#bpy.types.ClothSettings.use_pressure_volume) - [use_preview (bpy.types.ImageFormatSettings attribute)](bpy.types.ImageFormatSettings.html#bpy.types.ImageFormatSettings.use_preview) - [use_preview_alpha (bpy.types.Texture attribute)](bpy.types.Texture.html#bpy.types.Texture.use_preview_alpha) - [use_preview_range (bpy.types.Scene attribute)](bpy.types.Scene.html#bpy.types.Scene.use_preview_range) - [use_preview_world (bpy.types.Material attribute)](bpy.types.Material.html#bpy.types.Material.use_preview_world) - [use_primary_overlay (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_primary_overlay) - [use_primary_overlay_override (bpy.types.Brush attribute)](bpy.types.Brush.html#bpy.types.Brush.use_primary_overlay_override) - [use_project_only_selected (bpy.types.CurvePaintSettings attribute)](bpy.types.CurvePaintSettings.html#bpy.types.CurvePaintSettings.use_project_only_selected) - [use_project_opposite (bpy.types.ShrinkwrapConstraint attribute)](bpy.types.ShrinkwrapConstraint.html#bpy.types.ShrinkwrapConstraint.use_project_opposite) - [use_project_x (bpy.types.GreasePencilShrinkwrapModifier attribute)](bpy.types.GreasePencilShrinkwrapModifier.html#bpy.types.GreasePencilShrinkwrapModifier.use_project_x)   - [(bpy.types.ShrinkwrapModifier attribute)](bpy.types.ShrinkwrapModifier.html#bpy.types.ShrinkwrapModifier.use_project_x) - [use_project_y (bpy.types.GreasePencilShrinkwrapModifier attribute)](bpy.types.GreasePencilShrinkwrapModifier.html#bpy.types.GreasePencilShrinkwrapModifier.use_project_y)   - [(bpy.types.ShrinkwrapModifier attribute)](bpy.types.ShrinkwrapModifier.html#bpy.types.ShrinkwrapModifier.use_project_y) - [use_project_z (bpy.types.GreasePencilShrinkwrapModifier attribute)](bpy.types.GreasePencilShrinkwrapModifier.html#bpy.types.GreasePencilShrinkwrapModifier.use_project_z)   - [(bpy.types.ShrinkwrapModifier attribute)](bpy.types.ShrinkwrapModifier.html#bpy.types.ShrinkwrapModifier.use_project_z) - [use_property_decorate (bpy.types.UILayout attribute)](bpy.types.UILayout.html#bpy.types.UILayout.use_property_decorate) - [use_property_split (bpy.types.UILayout attribute)](bpy.types.UILayout.html#bpy.types.UILayout.use_property_split) - [use_proportional_action (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_action) - [use_proportional_connected (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_connected) - [use_proportional_edit (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_edit) - [use_proportional_edit_mask (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_edit_mask) - [use_proportional_edit_objects (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_edit_objects) - [use_proportional_fcurve (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_fcurve) - [use_proportional_projected (bpy.types.ToolSettings attribute)](bpy.types.ToolSettings.html#bpy.types.ToolSettings.use_proportional_projected) - [use_proxies (bpy.types.