bpy.context.temp_override - TypeError: Area not found in screen #108763

New Issue

Andrej · 2023-06-08T15:37:46+02:00

Andrej commented

2023-06-08 15:37:46 +02:00

Blender 3.5.1

When I try to run bpy.context.temp_override with area that's not present on current screen I get the error below.
It's useful feature that helps to run operators without switching screen.

Tried the same thing with old context override workflow like bpy.ops.node.clipboard_copy(temp_override) and it works without errors.

# Error: Python: Traceback (most recent call last):
# File "test_nodes_copy.blend\error", line 37, in <module>
# File "test_nodes_copy.blend\error", line 25, in copy_node_graph_to_active_object
# TypeError: Area not found in screen

ways to reproduce

I've attached .blend file with the setup and code below that's causing the error - to reproduce you can open it and just play the "error" script from "Scripting". There is also "working" script that using old context override and it works without errors.

Code that causes error (the code itself is copying node graph from one material to another - haven't found other method to do so besides calling operators on areas from other screen):

import bpy

def get_shader_editor_context():
    for screen in bpy.data.screens:
        for area in screen.areas:
            if area.type == "NODE_EDITOR":
                for space in area.spaces:
                    if space.tree_type == "ShaderNodeTree":
                        context_override = {"area": area, "space": space, "screen": screen}
                        return context_override

def copy_node_graph_to_active_object(material):
    temp_override = get_shader_editor_context()
    old_material = bpy.context.object.active_material
    new_material = material
    
    # remove all nodes from the current material
    for n in old_material.node_tree.nodes[:]:
        old_material.node_tree.nodes.remove(n)
    
    # change current material and make other window's shader editor is updated
    bpy.context.object.active_material = new_material
    temp_override['space'].node_tree = new_material.node_tree
    
    with bpy.context.temp_override(**temp_override):
        # select all nodes and copy them to clipboard
        for node in new_material.node_tree.nodes:
            node.select = True
        bpy.ops.node.clipboard_copy()

        # back to original material
        bpy.context.object.active_material = old_material
        temp_override['space'].node_tree = old_material.node_tree
        bpy.ops.node.clipboard_paste(offset=(0,0))


copy_node_graph_to_active_object(bpy.data.materials['test'])

Deprecated temp context override method that's working:

import bpy

def get_shader_editor_context():
    for screen in bpy.data.screens:
        for area in screen.areas:
            if area.type == "NODE_EDITOR":
                for space in area.spaces:
                    if space.tree_type == "ShaderNodeTree":
                        context_override = {"area": area, "space": space, "screen": screen}
                        return context_override

def copy_node_graph_to_active_object(material):
    temp_override = get_shader_editor_context()
    old_material = bpy.context.object.active_material
    new_material = material
    
    # remove all nodes from the current material
    for n in old_material.node_tree.nodes[:]:
        old_material.node_tree.nodes.remove(n)
    
    # change current material and make other window's shader editor is updated
    bpy.context.object.active_material = new_material
    temp_override['space'].node_tree = new_material.node_tree
    
    # select all nodes and copy them to clipboard
    for node in new_material.node_tree.nodes:
        node.select = True
    bpy.ops.node.clipboard_copy(temp_override)

    # back to original material
    bpy.context.object.active_material = old_material
    temp_override['space'].node_tree = old_material.node_tree
    bpy.ops.node.clipboard_paste(temp_override, offset=(0,0))


copy_node_graph_to_active_object(bpy.data.materials['test'])

Blender 3.5.1 When I try to run `bpy.context.temp_override` with area that's not present on current screen I get the error below. It's useful feature that helps to run operators without switching screen. Tried the same thing with old context override workflow like `bpy.ops.node.clipboard_copy(temp_override)` and it works without errors. ``` # Error: Python: Traceback (most recent call last): # File "test_nodes_copy.blend\error", line 37, in <module> # File "test_nodes_copy.blend\error", line 25, in copy_node_graph_to_active_object # TypeError: Area not found in screen ``` ## ways to reproduce I've attached .blend file with the setup and code below that's causing the error - to reproduce you can open it and just play the "error" script from "Scripting". There is also "working" script that using old context override and it works without errors. Code that causes error (the code itself is copying node graph from one material to another - haven't found other method to do so besides calling operators on areas from other screen): ```python import bpy def get_shader_editor_context(): for screen in bpy.data.screens: for area in screen.areas: if area.type == "NODE_EDITOR": for space in area.spaces: if space.tree_type == "ShaderNodeTree": context_override = {"area": area, "space": space, "screen": screen} return context_override def copy_node_graph_to_active_object(material): temp_override = get_shader_editor_context() old_material = bpy.context.object.active_material new_material = material # remove all nodes from the current material for n in old_material.node_tree.nodes[:]: old_material.node_tree.nodes.remove(n) # change current material and make other window's shader editor is updated bpy.context.object.active_material = new_material temp_override['space'].node_tree = new_material.node_tree with bpy.context.temp_override(**temp_override): # select all nodes and copy them to clipboard for node in new_material.node_tree.nodes: node.select = True bpy.ops.node.clipboard_copy() # back to original material bpy.context.object.active_material = old_material temp_override['space'].node_tree = old_material.node_tree bpy.ops.node.clipboard_paste(offset=(0,0)) copy_node_graph_to_active_object(bpy.data.materials['test']) ``` Deprecated temp context override method that's working: ```python import bpy def get_shader_editor_context(): for screen in bpy.data.screens: for area in screen.areas: if area.type == "NODE_EDITOR": for space in area.spaces: if space.tree_type == "ShaderNodeTree": context_override = {"area": area, "space": space, "screen": screen} return context_override def copy_node_graph_to_active_object(material): temp_override = get_shader_editor_context() old_material = bpy.context.object.active_material new_material = material # remove all nodes from the current material for n in old_material.node_tree.nodes[:]: old_material.node_tree.nodes.remove(n) # change current material and make other window's shader editor is updated bpy.context.object.active_material = new_material temp_override['space'].node_tree = new_material.node_tree # select all nodes and copy them to clipboard for node in new_material.node_tree.nodes: node.select = True bpy.ops.node.clipboard_copy(temp_override) # back to original material bpy.context.object.active_material = old_material temp_override['space'].node_tree = old_material.node_tree bpy.ops.node.clipboard_paste(temp_override, offset=(0,0)) copy_node_graph_to_active_object(bpy.data.materials['test']) ```

temp_override_error.blend

869 KiB

Andrej added the

labels 2023-06-08 15:37:47 +02:00

Andrej changed title from ~~bpy.context.temp_override~~ to bpy.context.temp_override - TypeError: Area not found in screen

2023-06-08 16:54:03 +02:00