Python Automation – How to Access Audio Field Inside Struct in Data Asset Blueprint?

Development Pipeline & Plugins
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ChatGPT kindly put this Python automation script together for me (and even drafted this post :folded_hands:). Could someone help me figure out the exact property name for the audio field inside my struct?

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I’m working with a Blueprint Data Asset called BPDA_DialogueNPC.
Inside it there’s a struct named DialogueData (type E_DialogueNpcData). In the editor I can see an audio slot, but when I try to set it from Python—using any of the obvious name AudioToPlay—I get:

StructBase: Failed to find property '<NameTried>' on 'E_DialogueNpcData'

How can I discover (or expose) the real field name so my script can do:

dialogue_struct.set_editor_property("<CorrectFieldName>", my_sound)

UE 5.4 — Python Editor Script Plugin enabled.

import unreal

# ───────────────────────── CONFIGURATION ─────────────────────────
DA_CLASS = unreal.load_class(
    None,
    "/Game/CommonGameplaySystems/Dialogues/Data/BPDA_DialogueNPC.BPDA_DialogueNPC_C"
)  # Blueprint class used for every new Data Asset

DEST_FOLDER  = "/Game/Data/Audio"                                  # Output folder for the generated assets
AUDIO_FOLDER = "/Game/-VFOS-/Assets/Wavs/Vixens/Irina/CommoPhases" # Folder that contains all the SoundWaves / SoundCues
OVERWRITE    = False                                               # Set to True to replace existing assets
# ─────────────────────────────────────────────────────────────────

asset_tools = unreal.AssetToolsHelpers.get_asset_tools()
editor_lib  = unreal.EditorAssetLibrary
paths_lib   = unreal.Paths

# ─────────────────── Gather all audio assets ─────────────────────
raw_paths = editor_lib.list_assets(
    AUDIO_FOLDER,
    recursive=True,
    include_folder=False
)

# Only keep SoundWave / SoundCue (both derive from SoundBase)
audio_assets = [
    unreal.load_asset(p)
    for p in raw_paths
    if isinstance(unreal.load_asset(p), unreal.SoundBase)
]

unreal.log(f"🎧 Found {len(audio_assets)} valid audio assets")

# ────────────────── Create one Data Asset per audio ──────────────
for sound in audio_assets:
    base_name = paths_lib.get_base_filename(sound.get_path_name())
    da_name   = f"DA_{base_name}"
    full_path = f"{DEST_FOLDER}/{da_name}"

    # Skip if the asset already exists and we are not overwriting
    if not OVERWRITE and editor_lib.does_asset_exist(full_path):
        unreal.log_warning(f"❌ {da_name} already exists, skipped")
        continue

    # Create the new Data Asset
    data_asset = asset_tools.create_asset(
        da_name,          # asset name
        DEST_FOLDER,      # destination folder
        DA_CLASS,         # class to use
        unreal.DataAssetFactory()  # factory for UDataAsset-based assets
    )

    # 1) Read the 'DialogueData' struct from the new asset
    dialogue_struct = data_asset.get_editor_property("DialogueData")

    # 2) Set the audio field (make sure the field name is correct)
    dialogue_struct.set_editor_property("AudioToPlay", sound)

    # 3) Write the modified struct back to the Data Asset
    data_asset.set_editor_property("DialogueData", dialogue_struct)

    # Save the asset to disk
    editor_lib.save_loaded_asset(data_asset)
    unreal.log(f"✅ {da_name} created with {sound.get_name()}")

unreal.log("🏁 All done")