Unable to set editor_property from spawned blueprint object in python

Development Programming & Scripting
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2

Ok, I got it hours later, it seems that the default value winw, so one needs to override the default value.

    # need to be set before spawning, otherwise
    # the value will be reset to the default in
    # the construction phase
    cdo = unreal.get_default_object(bp_class)
    cdo.set_editor_property("Prompt", "Hello Word Again")

I assume using data object that encapsulate the data will not lead to the same behaviour.

Full Script:

import unreal
import json
import os
import random
  
# Load JSON entries
file_path = os.path.join(os.path.dirname(__file__), "test_content", "content.json")
  
with open(file_path, "r", encoding="utf-8") as f:
    entries = json.load(f)
  
# Path to the source Blueprint
source_bp_path = "/Game/ThirdPerson/AI/Enemy_Character.Enemy_Character"
  
# Destination for generated assets
destination_folder = "/Game/ThirdPerson/AI/Generated_Characters"
  
# Ensure the folder exists
if not unreal.EditorAssetLibrary.does_directory_exist(destination_folder):
    unreal.EditorAssetLibrary.make_directory(destination_folder)
  
# Get world and nav system, used to spawn at location down the line
world = unreal.EditorLevelLibrary.get_editor_world()
nav_sys = unreal.NavigationSystemV1.get_navigation_system(world)
  
  
for entry in entries:
    asset_name = f"{entry['id']}_BP"
    asset_path = f"{destination_folder}/{asset_name}"
  
    asset = unreal.EditorAssetLibrary.load_asset(asset_path)
    if not asset:
        asset = unreal.EditorAssetLibrary.duplicate_asset(source_bp_path, asset_path)
        
    # Load class from duplicated Blueprint
    generated_class_path = f"{asset_path}.{asset_name}"
    bp_class = unreal.EditorAssetLibrary.load_blueprint_class(generated_class_path)
  
    # need to be set before spawning, otherwise
    # the value will be reset to the default in
    # the construction phase
    cdo = unreal.get_default_object(bp_class)
    cdo.set_editor_property("Prompt", "Hello Word Again")
    
    # Close to the players launch area for now
    origin = unreal.Vector(900, 1110, 92)
    radius = 10000
    location = nav_sys.get_random_reachable_point_in_radius(world, origin, radius)
  
    if not location:
        print(f"No valid navigable location found for {entry['id']}")
        quit() #fail early
    
    actor = unreal.EditorLevelLibrary.spawn_actor_from_class(bp_class, location, rotation = unreal.Rotator(0, random.uniform(0, 360), 0) )
    
    unreal.EditorAssetLibrary.save_loaded_asset(asset)