I had some fun using the "eraser" script.
It seems to work in 3 different irregular ways.

It makes round holes in surfaces, or solids, in one view.

Sometimes the curve needs to be closed and selected, but sometimes it works on an open curve, selected or not selected, or else "calculation fails".

For some curves it leaves behind a partial circular arc, sometimes a gap.

The descriptions swiss cheese and nibbler come to mind...

- Brian