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This is makeindex, version 2.15 [TeX Live 2018] (kpathsea + Thai support).
Scanning style file ./python.ist.......done (7 attributes redefined, 0 ignored).
Scanning input file PathFlowAI.idx....done (277 entries accepted, 0 rejected).
Sorting entries.....done (2411 comparisons).
Generating output file PathFlowAI.ind....done (505 lines written, 0 warnings).
Output written in PathFlowAI.ind.
Transcript written in PathFlowAI.ilg.