Bug located in ...

[Knam-Ansys]

Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

Description of the bug

edb.modeler.unite_polygons_on_layer() function does not work well now.
They change net name after merging it.
I used below code that fixed the issue.
I made it by claude. It would be good if it helps you resolving the issue.

I tested on 2025 R1.

def fixed_unite_polygons_on_layer(self, layer_name=None, delete_padstack_gemometries=False, net_names_list=[]):
"""Fixed version of unite_polygons_on_layer"""

if isinstance(layer_name, str):
    layer_name = [layer_name]
if not layer_name:
    layer_name = list(self._pedb.stackup.signal_layers.keys())

for lay in layer_name:
    self._logger.info("Uniting Objects on layer %s.", lay)
    poly_by_nets = {}
    delete_list = []

    if lay in list(self.polygons_by_layer.keys()):
        for poly in self.polygons_by_layer[lay]:
            poly = poly._edb_object
            net_name = poly.GetNet().GetName()
            if net_name:
                if net_name not in poly_by_nets:
                    poly_by_nets[net_name] = []
                poly_by_nets[net_name].append(poly)

    for current_net, polygons in poly_by_nets.items():
        if current_net in net_names_list or not net_names_list:
            list_polygon_data = []
            all_voids = []
            current_delete_list = []

            for poly in polygons:
                list_polygon_data.append(poly.GetPolygonData())
                current_delete_list.append(poly)
                all_voids.append(poly.Voids)

            if list_polygon_data:
                united_polygons = self._edb.geometry.polygon_data.unite(
                    convert_py_list_to_net_list(list_polygon_data)
                )

                for united_item in united_polygons:
                    for voids in all_voids:
                        for void in voids:
                            if int(united_item.GetIntersectionType(void.GetPolygonData())) == 2:
                                united_item.AddHole(void.GetPolygonData())

                    self.create_polygon(
                        united_item,
                        layer_name=lay,
                        voids=[],
                        net_name=current_net
                    )

                delete_list.extend(current_delete_list)

    for poly in delete_list:
        poly.Delete()

if delete_padstack_gemometries:
    self._logger.info("Deleting Padstack Definitions")
    for pad in self._pedb.padstacks.definitions:
        p1 = self._pedb.padstacks.definitions[pad].edb_padstack.GetData()
        if len(p1.GetLayerNames()) > 1:
            self._pedb.padstacks.remove_pads_from_padstack(pad)

return True

Steps To Reproduce

[]

Which Operating System are you using?

Windows

Which Python version are you using?

3.7

Installed packages

pyedb