How to use the netgraph._line_supercover.line_supercover function in netgraph

def _get_tile_positions(self):
        # find tiles through which a each edge crosses using the line supercover
        # (an extension of Bresenheims algorithm)
        tile_positions = []
        for (v0, v1) in self.edge_list:
            x0, y0 = self.node_positions[v0]
            x1, y1 = self.node_positions[v1]

            x0 = np.int(np.round(x0))
            y0 = np.int(np.round(y0))
            x1 = np.int(np.round(x1))
            y1 = np.int(np.round(y1))

            x, y = line_supercover(x0, y0, x1, y1)
            tile_positions.extend(zip(x.tolist(), y.tolist()))

        # remove duplicates
        tile_positions = list(set(tile_positions))
        return tile_positions