Did I find the right examples for you? yes no

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The purpose of this file is to allow instancemethods to be pickable.
This is needed in setup.py only and not installed anywhere, thus is not
a library file. It solves the issue from #11874.

src/s/a/sage-HEAD/src/setup.py   sage(Download)
    from multiprocessing import Pool
    import fpickle_setup #doing this import will allow instancemethods to be pickable
    p = Pool(nthreads)
    process_command_results(p.imap(apply_pair, command_list))