Select curve objects by extrusion profile object

Question

I need to select all curve objects in my scene that have their bevel geometry set to OBJECT and share the same “profile object” (bevel object):

bpy.context.object.data.bevel_object = bpy.data.objects["MY EXTRUSION OBJECT"]

Or do it in the “reversed” way - first select a curve object that is shared between multiple curve objects as their profile, and then select those objects. Either of the above will satisfy me.

I guess that would be some simple script? Can you help?

Answer 1

Using the second method that can be this script:

import bpy

# get the bevel object as the active one
bevel_object = bpy.context.active_object
# or get it by its name
#bevel_object = bpy.context.scene.objects["bevel object name"]

# loop over all objects in the scene
for obj in bpy.context.scene.objects:
    # select flag: 
    # a curve 
    # in object bevel mode 
    # that has the bevel object we want
    select = obj.type == 'CURVE' \
            and obj.data.bevel_mode == 'OBJECT' \
            and obj.data.bevel_object == bevel_object
    
    # select if yes / unselect if no
    obj.select_set(select)

For the first method, if you have several bevel objects in use the selection may mix everyone... so I don't think this is easier.

Answer 2

That's the slightly simplified version:

import bpy
for obj in bpy.context.scene.objects:
    select = obj.type == 'CURVE' \
        and obj.data.bevel_mode == 'OBJECT' \
        and obj.data.bevel_object == bpy.context.active_object
    obj.select_set(select)