Refactor: lazy import anim_utils from bpy_extras

Import `anim_utils` from `bpy_extras` in a lazy way, instead of at the top
of the module. This will improve load times of Blender.

No functional changes.

Pull Request: https://projects.blender.org/blender/blender/pulls/147215

scripts/addons_core/pose_library/pose_creation.py

@@ -30,7 +30,6 @@ from bpy.types import (
     FCurve,
     Keyframe,
 )
-from bpy_extras import anim_utils
 
 FCurveValue = Union[float, int]
 
@@ -78,6 +77,7 @@ class PoseActionCreator:
 
     def create(self) -> Optional[Action]:
         """Create a single-frame Action containing only the given bones, or None if no anim data was found."""
+        from bpy_extras import anim_utils
 
         try:
             dst_action = self._create_new_action()
@@ -116,6 +116,8 @@ class PoseActionCreator:
 
     def _store_animated_parameters(self, dst_channelbag: ActionChannelbag) -> None:
         """Store the current value of any animated bone properties."""
+        from bpy_extras import anim_utils
+
         if self.params.src_action is None:
             return
         src_channelbag = anim_utils.action_get_channelbag_for_slot(self.params.src_action, self.params.src_action_slot)

scripts/modules/animsys_refactor.py

@@ -16,8 +16,6 @@ import sys
 
 import bpy
 
-from bpy_extras import anim_utils
-
 IS_TESTING = False
 
 
@@ -153,6 +151,7 @@ def update_data_paths(rna_update, log=sys.stdout):
                 and options is an opaque data.
                 class_name, fcurve and options may be None!
     """
+    from bpy_extras import anim_utils
 
     rna_update_from_map = {}
     for ren_class, ren_from, ren_to, options in rna_update:

scripts/startup/bl_operators/object.py

@@ -14,7 +14,6 @@ from bpy.app.translations import (
     pgettext_rpt as rpt_,
     contexts as i18n_contexts,
 )
-from bpy_extras import anim_utils
 
 
 class SelectPattern(Operator):
@@ -821,6 +820,8 @@ class TransformsToDeltasAnim(Operator):
         return (obs is not None)
 
     def execute(self, context):
+        from bpy_extras import anim_utils
+
         # map from standard transform paths to "new" transform paths
         STANDARD_TO_DELTA_PATHS = {
             "location": "delta_location",

scripts/startup/bl_operators/rigidbody.py

@@ -8,7 +8,6 @@ from bpy.props import (
     EnumProperty,
     IntProperty,
 )
-from bpy_extras import anim_utils
 
 
 class CopyRigidbodySettings(Operator):
@@ -107,6 +106,8 @@ class BakeToKeyframes(Operator):
         return (obj and obj.rigid_body)
 
     def execute(self, context):
+        from bpy_extras import anim_utils
+
         bake = []
         objects = []
         scene = context.scene

scripts/startup/bl_operators/sequencer.py

@@ -14,7 +14,6 @@ from bpy.props import (
     IntProperty,
 )
 from bpy.app.translations import pgettext_rpt as rpt_
-from bpy_extras import anim_utils
 
 
 def _animated_properties_get(strip):
@@ -146,6 +145,8 @@ class SequencerFadesClear(Operator):
         return strip is not None
 
     def execute(self, context):
+        from bpy_extras import anim_utils
+
         scene = context.scene
         animation_data = scene.animation_data
         if animation_data is None: