Rhino Python - Extract multi SubSurf and delete the originals

Hello everyone,

I’ve been looking for a long time, but I can’t find the solution.
I really hope you can help me.

I want to delete some subsurfaces from a polysurface. But I want to be able to make a selection of several subsurfaces at the same time.

From what I understand, Rhinocommon is the best/only tool for the job.
But rhinocommon’s behavior means that I can’t delete the selected subsurfaces without deleting the whole polysurface.

I thought I’d try extracting the sub-surfaces in order to remove them from the polysurface.
But same thing, the surfaces are extracted, but the originals always remain.

Whereas when I use rs.GetObject to select a single subsurface, it is extracted and the original is removed.

So rs.GetObject allows you to select a subsurface, but only one at a time.
And I can’t delete the originals subsurfaces, with Rhinocommon.

Thanks for your help and explanations, I really need them.

import rhinoscriptsyntax as rs
import Rhino


def get_brep_faces():
    sub_surfaces = []

    # Create a GetObject object to prompt the user to select surfaces
    go = Rhino.Input.Custom.GetObject()
    go.SetCommandPrompt("Select surfaces")
    go.GeometryFilter = Rhino.DocObjects.ObjectType.Surface
    go.SubObjectSelect = True
    go.GetMultiple(1, 0)

    # Check if the user selection was successful
    if go.CommandResult() != Rhino.Commands.Result.Success:
        return

    # Iterate through the selected objects
    for objref in go.Objects():
        # Get the face of the object reference
        face = objref.Face()
        # Convert the face to a Brep
        sub_srf = face.ToBrep()
        # Append the Brep to the list of sub-surfaces
        sub_surfaces.append(sub_srf)
        # Print information about the selected object
        print(objref.ObjectId)
        print(objref.GeometryComponentIndex.ComponentIndexType)
        print(objref.GeometryComponentIndex.Index)

    # Check if any sub-surfaces were selected
    if sub_surfaces is None:
        print("No sub-surfaces selected.")
    else:
        print("Sub-surfaces have been selected successfully.")
        return sub_surfaces


# Call the get_brep_face function to get the sub-surfaces
subsurfaces = get_brep_faces()

# If there are sub-surfaces, extract them from their parent surfaces
if subsurfaces:
    for obj in subsurfaces:
        rs.ExtractSurface(obj, 0, False)

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