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In blender 5.0 beta there is the new array modifier. ( in the background it is actually a "geometry node group" )

The modifier can be added and updated via python with:

bpy.ops.object.modifier_add_node_group(asset_library_type='ESSENTIALS', 
                                        asset_library_identifier="", 
                                        relative_asset_identifier="nodes/geometry_nodes_essentials.blend/NodeTree/Array", 
                                        use_selected_objects=False)
bpy.context.object.modifiers["Array"]["Socket_5"] = 6 # set the count
bpy.context.object.modifiers["Array"].node_group.interface_update(bpy.context) # update UI and 3D Viewer

Does anyone know how to create this NodesModifier without using bpy.ops ?

Thanks

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1 Answer 1

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https://projects.blender.org/blender/blender/issues/117399

import bpy
import os

object = bpy.context.object

node_group_name = 'Array'

node_group = bpy.data.node_groups.get(node_group_name)
if not node_group:
    path = os.path.join(
        os.path.dirname(bpy.app.binary_path),
        f'{bpy.app.version[0]}.{bpy.app.version[1]}',
        'datafiles', 'assets', 'nodes', 'geometry_nodes_essentials.blend'
    )
    with bpy.data.libraries.load(path) as (data_from, data_to):
        data_to.node_groups = [node_group_name]

    node_group = data_to.node_groups[0]

modifier: bpy.types.NodesModifier = object.modifiers.new(name = node_group_name, type = 'NODES')
modifier.node_group = node_group
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