How to change paint brush in Blender 4.3 with python?

Question

Up until Blender 4.2 I could change my brush like this:

my_brush = D.brushes['my_brush']

C.tool_settings.image_paint.brush = my_brush

Now in Blender 4.3 with the advent of the asset browser also in Brushes, I can't figure out how to change the Brush.

Any ideas? Do I have to use the bpy.ops.brush.asset_activate() operator?

To test this, do the following.

In Object mode:

Now set the Context object to Texture Paint mode:

Check the image_paint.brush:

Answer 1

The problem is not related to Blender's version.

You did right actions but in the wrong order.

It should be:

1. bpy.ops.object.mode_set(mode='TEXTURE_PAINT')
2. my_brush = D.brushes.new("My Brush")
3. C.tool_settings.image_paint.brush = my_brush

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To summarize: you just cannot set current brush outside from Texture Paint mode.

Meantime you can create new brush from any mode you like.

Hence (1) and (2) can be swapped. But (3) ALWAYS should be the last.