This is probably tu funniest widget, an EditorViewportClient and a whole World all in a single SWidget:

from unreal_engine import SWindow, SPythonEditorViewport, FVector, FRotator

from unreal_engine.classes import Blueprint

import unreal_engine as ue

editor_viewport = SPythonEditorViewport()

world = editor_viewport.get_world()

world.actor_spawn(ue.load_object(Blueprint, '/Game/ThirdPersonCPP/Blueprints/ThirdPersonCharacter').GeneratedClass)

editor_viewport_client = editor_viewport.get_editor_viewport_client()

editor_viewport_client.set_view_location(FVector(-200, 300, 200))

editor_viewport_client.set_view_rotation(FRotator(0, -30, -90))

window = SWindow(client_size=(512, 256), title='Mannequin Properties', sizing_rule=0)(

(

editor_viewport

)

)