I have a custom node tree called MyCustomTreeType. I know that there are scripts to add nodes to the composite and material node trees: Controling compositor by python
How can I use this with my custom tree?
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The example of the custom PyNode tree includes information about how to add nodes to the menus via
NodeCategory so i'm going to assume you've got menus working.
(if not: see TextEditor > Templates > Python > Custom Nodes )
If you want to add a node via python, it's the same as with shader trees or compositor trees, except you use
ng = bpy.data.node_groups['MyNodeTree'] new_node = ng.nodes.new(your_nodes_bl_idname) new_node.location = (20, 40)