Check on empty cell/Layers in GDS

Kumaran

Dear Matthias,
1) May I know how to find the Empty Cell/Layers when we open the existing GDS, I understand when we re-extract or save the file by Don`t write empty cells. kindly guide me.
Rgds
KumaranS

ravn

@Kumaran : This Python code seem to do the trick:

if pya.CellView.active() is not None:
    ly = pya.CellView.active().layout()
    layers = ly.layer_indexes()
    for cell in ly.each_cell():
        empty = True
        if cell.child_instances() > 0:
            empty = False
        for layer in layers:
            each_shape = list(cell.each_shape(layer))
            if len(each_shape) > 0:
                empty = False
        if empty:
            print(f"Cell {cell.name} is empty")

If you put that in a file in the Macro Development editor and run with the layout you are interested in active, you will get a printed list of all cells that do not contain any shapes or any child cells in the console.

If you need to run this often, you can place it in the Macros meny by appropriate settings under

Then you might want to report the result in a GUI dialog instead. Checkout the Qt documentation of KLayout to know how to open a window dialog.

Kumaran

Dear Ravn,
Thanks, it works fine, Thanks a lot for the support.
Rgds
KumaranS