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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 _get_variant_regions(items):
 """Retrieve variant regions defined in any of the input items. """

    return list(filter(lambda x: x is not None,
                       [tz.get_in(("config", "algorithm", "variant_regions"), data)
                        for data in items
                        if tz.get_in(["config", "algorithm", "coverage_interval"], data) != "genome"]))