Perhaps for my needs, I can force the database to be use GetSceneRepository, anyway, it's worth a try. Thank you for your guidance

Thanks for the tips, sadly to see that GetDefaultSettings is broken, and I tried GetDefaultObject. It is way too slow, so I had to give up this until GetDefaultSettings fixed.

Thanks for your time

Cheess~
DunHou

Thank you for reaching out to us. No, you do not need PresetLoadArgs, these are only required when you want to handle preset asset drag events. To load a preset, you just need maxon.AssetCreationInterface, which has been wrapped for Python. The primary method to use for this would be GetDefaultSettings, which unfortunately is broken. I provide below a workaround with maxon.AssetCreationInterface.GetDefaultObject.

Depending on what you want to do GetDefaultObject will work fine (when you just have to load a handful of predefined presets) or a bit clunky (when you have to discover all preset assets for a given scene element type).

Because this concerns a bug, I have moved the topic.

Cheers,
Ferdinand

Result

Code

"""Demonstrates how the find and apply preset assets.

For this script to work sensibly, you should have a few preset assets for the Cube object, as 
accessible with the preset dropdown in the top right corner of the Attribute Manager.
"""

import c4d
import maxon

doc: c4d.documents.BaseDocument  # The currently active document.
op: c4d.BaseObject | None  # The primary selected object in `doc`. Can be `None`.

def main() -> None:
    """Called by Cinema 4D when the script is being executed.
    """
    # Get the global asset repository and all preset assets in it.
    repo: maxon.AssetRepositoryRef = maxon.AssetInterface.GetUserPrefsRepository()
    presets: list[maxon.AssetDescription] = repo.FindAssets(
        maxon.AssetTypes.DefaultsPreset(), maxon.Id(), maxon.Id(), maxon.ASSET_FIND_MODE.LATEST)

    # Now iterate over all assets in it:
    for i, asset in enumerate(presets):
        c4d.gui.StatusSetBar(float(i) / float(len(presets)))
        c4d.gui.StatusSetText(f"Processing {i + 1} of {len(presets)} assets...")

        # Get the name of the asset.
        name: str = asset.GetMetaString(maxon.OBJECT.BASE.NAME, maxon.Resource.GetCurrentLanguage(), "")

        # This is how we would do this normally, but #GetDefaultSettings is brokeen. #types would
        # hold the BaseList2D types #asset is applicable to, and #settings would hold the data
        # container for the preset.
        # types: maxon.BaseArray[maxon.Int32] = maxon.BaseArray(maxon.Int32)
        # settings: c4d.BaseContainer = c4d.BaseContainer()
        # maxon.AssetCreationInterface.GetDefaultSettings(asset, types, settings)

        # As a workarround, we can do this, which even without inserting the nodes, is very much 
        # not a cheap operation. Doing this for a handful of assets (e.g., a list of hard-coded
        # presets) is fine, but for all of them, it takes a while.
        op: c4d.BaseList2D = maxon.AssetCreationInterface.GetDefaultObject(asset)
        if not op:
            continue
        
        # We found an Ocube asset.
        if op.CheckType(c4d.Ocube):
            op.SetName(name)
            doc.InsertObject(op)
    
    c4d.gui.StatusClear()
    c4d.EventAdd()

if __name__ == '__main__':
    main()