How to unregister `Backdrop` node

[pierremonico]

Hey, I am trying to instantiate a graph that doesn't include the Backdrop Node:

class MyNodeGraph(NodeGraph):
    def __init__(self, parent=None):
        super(MyNodeGraph, self).__init__(parent)

However, __init__ calls _register_builtin_nodes(), which calls register_node(BackdropNode, alias='Backdrop'). So unless I override __init__, my best bet is to delete the node. Weirdly, I am not able to access it by any means (self in the current context is an instance of MyNodeGraph):

> self.registered_nodes()
> ['nodeGraphQt.nodes.BackdropNode']

> backdrop_node_type = self.registered_nodes()[0]

> print(backdrop_node_type)
> nodeGraphQt.nodes.BackdropNode

> self.get_nodes_by_type(backdrop_node_type)
> []

> self.get_node_by_name("Backdrop")
> None

Am I missing something? How can I access that Backdrop node and unregister it from the graph?

[timothyliu3d]

There is no feature to unregister specific types from what I can tell.
You will have to identify and remove them from the factory internals (e.g. types, names, aliases).

There's two simpler options you can do within NodeGraph that are good-enough-for-now:

1. Override self._register_builtin_nodes() to do nothing.

2. Call self.node_factory.clear_registered_nodes() right after super init.

Both these rely on the fact that "backdrop" is the only builtin type in version 0.6.43 (latest as of now).