How can I delete keyframes and animation data for all selected objects?

Question

I am trying to do as the title suggests: remove all keyframes and animation data from all selected objects.

I am just starting out with Python and add-on development so this has proven to be a challenge for me. This is what I have sofar:

class CULT_ClearAnimData(Operator):
    bl_label = "Clear Animation Data"
    bl_idname = "object.clear_anim_data"
    bl_options = {'REGISTER', 'UNDO'}

    def execute(self, context):
        selected_obj = bpy.context.selected_objects
        scene = bpy.context.scene

        for x in selected_obj:
            selected_obj[x].select_set(True)
            bpy.ops.anim.keyframe_clear_v3d()

        return {'FINISHED'}

Edit: Got this to work:

class CULT_ClearAnimData(Operator):
bl_label = "Clear Animation Data"
bl_idname = "object.clear_anim_data"
bl_options = {'REGISTER', 'UNDO'}

def execute(self, context):
    sel_objs = [obj for obj in bpy.context.selected_objects]
    #bpy.ops.object.select_all(action='DESELECT')
    for obj in sel_objs:
        bpy.ops.anim.keyframe_clear_v3d()

    return {'FINISHED'}

I am not sure if my solution is "proper" or safe, but it works. Any alternative ways would be helpful.

Answer 1

One fell swoop approach.

copying the script from Delete animation of object

Uses Object.animation_data_clear() to remove all animation data from all selected objects.

import bpy

context = bpy.context
for ob in context.selected_objects:
    ob.animation_data_clear()

this will orphan any action not associated with other objects, and they will be dealt with on file save / reload.

Otherwise

orphans = [a for a in bpy.data.actions if not a.users]
while orphans:
    bpy.data.actions.remove(orphans.pop())

Answer 2

I don't believe you have to deal with keyframes individually. It's also better sometimes to avoid bpy.ops calls, as they're slower and IMO sometimes more opaque.

Keyframes are associated to objects via actions, so as a basic example that should be similar to what you have:

for obj in objs:
    if obj.animation_data: #Check for presence of animation data.
        obj.animation_data.action = None

You may also want to get rid of all the NLA tracks, and all the drivers:

for obj in objs:
    if obj.animation_data and obj.animation_data.nla_tracks
        for nt in obj.animation_data.nla_tracks:
            obj.animation_data.nla_tracks.remove(nt)

for obj in objs:
    if obj.animation_data and obj.animation_data.drivers
        for dr in obj.animation_data.drivers:
            obj.animation_data.drivers.remove(dr)

(You probably want to combine the loops into one.)

Answer 3

It is not necessary to include the "bpy.ops.anim.keyframe_clear_v3d()" command in a for loop, as it removes all keyframe animation for the selected objects.

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