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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 add_highdepth_genome_exclusion(items):
 """Add exclusions to input items to avoid slow runtimes on whole genomes. """

    out = []
    for d in items:
        d = utils.deepish_copy(d)
        if dd.get_coverage_interval(d) == "genome":
            e = dd.get_exclude_regions(d)
            if "highdepth" not in e:
                e.append("highdepth")
                d = dd.set_exclude_regions(d, e)
        out.append(d)
    return out