- should open this level , or engine will crash
2.using unreal.EditorLevelUtils.add_level_to_world to add existing level
tarLevelPath = "/Game/Maps/Test"
unreal.EditorLoadingAndSavingUtils.load_map(sourLevel.get_path_name())
world = unreal.EditorLevelLibrary.get_editor_world()
ue.EditorLevelUtils.add_level_to_world(world,tarLevelPath,unreal.LevelStreamingAlwaysLoaded)
ue.EditorLevelLibrary.save_current_level()
could use unreal.LevelStreamingDynamic instead unreal.LevelStreamingAlwaysLoaded