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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _split_regions(chrom, start, end):
 """Split regions longer than 100kb into smaller sections. """

    window_size = 1e5
    if end - start < window_size * 5:
        return [(chrom, start, end)]
    else:
        out = []
        for r in pybedtools.BedTool().window_maker(w=window_size,
                                                   b=pybedtools.BedTool("%s\t%s\t%s" % (chrom, start, end),
                                                                        from_string=True)):
            out.append((r.chrom, r.start, r.end))
        return out