HYTOS

            for loop in self.loops:

                indices = [index for index in range(len(loop.items)) if

                           str(loop.items[index])[:3] == 'R_K' or str(loop.items[index])[:3] == 'L_K']

                if indices:

                    for i in range(len(indices)):

                        tag_no = loop.items[indices[i]].parent.tag_no

                        density = loop.density_elevations[loop.items[indices[i] - 1]]

                        hhp = self.comp_hydp_hy(flowrate_mass, density, round(diff_p, 3))

                        attribute['Tag_No'] = tag_no

                        attribute['Suct.P'] = suct_p

                        attribute['Disc.P'] = disc_p