def remove_label(self):
        """Clear the user's label for the item"""
        ln = len(self.category)
        for i, j in enumerate(self.category[::-1]):
            if j.scheme == LABEL_SCHEME:
                del(self.category[1-i-ln])
dataset/ETHPy150Open acil-bwh/SlicerCIP/Scripted/attic/PicasaSnap/gdata/books/__init__.py/Book.remove_label/swapped operands of `-`