This is makeindex, version 2.15 [TeX Live 2016] (kpathsea + Thai support). Scanning style file ./python.ist......done (6 attributes redefined, 0 ignored). Scanning input file networking.idx....done (35 entries accepted, 0 rejected). Sorting entries....done (196 comparisons). Generating output file networking.ind....done (50 lines written, 0 warnings). Output written in networking.ind. Transcript written in networking.ilg.