fix: update handler loading

__init__.py

@@ -23,7 +23,7 @@ from bpy.app.handlers import persistent
 DEPENDENCIES = {
     "zmq",
     "umsgpack",
-    "pyyaml"
+    "yaml"
 }
 
 
@@ -226,7 +226,6 @@ def register():
 
     bpy.app.handlers.load_post.append(load_handler)
     
-    
     operators.register()
     ui.register()
 

operators.py

@@ -13,6 +13,7 @@ import bpy
 from bpy_extras.io_utils import ExportHelper
 import mathutils
 from pathlib import Path
+from bpy.app.handlers import persistent
 
 from . import environment, client, draw, helpers, ui
 from .libs import umsgpack
@@ -88,6 +89,7 @@ def update_client_selected_object(context):
 
 # TODO: cleanup
 
+
 def init_datablocks():
     for datatype in environment.rtypes:
         if bpy.context.window_manager.session.supported_datablock[datatype].is_replicated:
@@ -347,7 +349,7 @@ class SessionSnapUserOperator(bpy.types.Operator):
     bl_description = "Description that shows in blender tooltips"
     bl_options = {"REGISTER"}
 
-    target_client = bpy.props.StringProperty()
+    target_client: bpy.props.StringProperty(default="None")
 
     @classmethod
     def poll(cls, context):
@@ -456,12 +458,12 @@ def get_datablock_from_update(update,context):
     if item_id == 'Master Collection':
         datablock_ref = bpy.context.scene
     elif item_type in helpers.BPY_TYPES.keys():
-        datablock_ref = getattr(bpy.data, helpers.BPY_TYPES[update.id.__class__.__name__])[update.id.name]
+        datablock_ref = getattr(
+            bpy.data, helpers.BPY_TYPES[update.id.__class__.__name__])[update.id.name]
     else:
         if item_id in bpy.data.lights.keys():
             datablock_ref = bpy.data.lights[item_id]
 
-
     return datablock_ref
 
 
@@ -473,6 +475,7 @@ def toogle_update_dirty(context, update):
         data_ref.is_dirty = True
 
 
+@persistent
 def depsgraph_update(scene):
     ctx = bpy.context
 
@@ -481,7 +484,6 @@ def depsgraph_update(scene):
             updates = ctx.view_layer.depsgraph.updates
             username = ctx.window_manager.session.username
 
-
             selected_objects = helpers.get_selected_objects(scene)
 
             for update in reversed(updates):
@@ -507,7 +509,8 @@ def depsgraph_update(scene):
                             client.instance.set(key)
                         else:
                             try:
-                                getattr(bpy.data, helpers.BPY_TYPES[update.id.__class__.__name__]).remove(item)
+                                getattr(bpy.data, helpers.BPY_TYPES[update.id.__class__.__name__]).remove(
+                                    item)
                             except:
                                 pass
                             break