def partial_page(self, page, used_labels):
        """Allows a page to be marked as already partially used so you can
        generate a PDF to print on the remaining labels.

        Parameters
        ----------
        page: positive integer
            The page number to mark as partially used. The page must not have
            already been started, i.e., for page 1 this must be called before
            any labels have been started, for page 2 this must be called before
            the first page is full and so on.
        used_labels: iterable
            An iterable of (row, column) pairs marking which labels have been
            used already. The rows and columns must be within the bounds of the
            sheet.

        """
        # Check the page number is valid.
        if page <= self.page_count:
            raise ValueError("Page {0:d} has already started, cannot mark used labels now.".format(page))

        # Add these to any existing labels marked as used.
        used = self._used.get(page, set())
        for row, column in used_labels:
            # Check the index is valid.
            if row < 1 or row > self.specs.rows:
                raise IndexError("Invalid row number: {0:d}.".format(row))
            if column < 1 or column > self.specs.columns:
                raise IndexError("Invalid column number: {0:d}.".format(column))

            # Add it.
            used.add((int(row), int(column)))

        # Save the details.
        self._used[page] = used
def partial_page ( self , page , used_labels ) : if page <= self . page_count : raise ValueError ( "Page {0:d} has already started, cannot mark used labels now." . format ( page ) ) used = self . _used . get ( page , set ( ) ) for row , column in used_labels : if row < 1 or row > self . specs . rows : raise IndexError ( "Invalid row number: {0:d}." . format ( row ) ) if column < 1 or column > self . specs . columns : raise IndexError ( "Invalid column number: {0:d}." . format ( column ) ) used . add ( ( int ( row ) , int ( column ) ) ) self . _used [ page ] = used
Allows a page to be marked as already partially used so you can
        generate a PDF to print on the remaining labels.

        Parameters
        ----------
        page: positive integer
            The page number to mark as partially used. The page must not have
            already been started, i.e., for page 1 this must be called before
            any labels have been started, for page 2 this must be called before
            the first page is full and so on.
        used_labels: iterable
            An iterable of (row, column) pairs marking which labels have been
            used already. The rows and columns must be within the bounds of the
            sheet.