def lonely_company(taxonomy, tax_ids):
    """Return a set of species tax_ids which will makes those in *tax_ids* not lonely.

    The returned species will probably themselves be lonely.
    """
    return [taxonomy.species_below(taxonomy.sibling_of(t)) for t in tax_ids]
Return a set of species tax_ids which will makes those in *tax_ids* not lonely.

    The returned species will probably themselves be lonely.