Add Chromium-only Blender WebEngine parity work

blender-5.2.0/doc/python_api/examples/bpy.props.0.py

@@ -0,0 +1,27 @@
+"""
+Assigning to Existing Classes
++++++++++++++++++++++++++++++
+
+Custom properties can be added to any subclass of an :class:`ID`,
+:class:`Bone` and :class:`PoseBone`.
+
+These properties can be animated, accessed by the user interface and Python
+like Blender's existing properties.
+
+.. warning::
+
+   Access to these properties might happen in threaded context, on a per-data-block level.
+   This has to be carefully considered when using accessors or update callbacks.
+
+   Typically, these callbacks should not affect any other data that the one owned by their data-block.
+   When accessing external non-Blender data, thread safety mechanisms should be considered.
+
+"""
+
+import bpy
+
+# Assign a custom property to an existing type.
+bpy.types.Material.custom_float = bpy.props.FloatProperty(name="Test Property")
+
+# Test the property is there.
+bpy.data.materials[0].custom_float = 5.0