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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 addPhenotypeSearchOptions(parser):
 """ Adds options to a phenotype searches command line parser. """

    parser.add_argument(
        "--phenotype_association_set_id", "-s", default=None,
        help="Only return phenotypes from this phenotype_association_set.")
    parser.add_argument(
        "--phenotype_id", "-p", default=None,
        help="Only return this phenotype.")
    parser.add_argument(
        "--description", "-d", default=None,
        help="Only return phenotypes matching this description.")
    parser.add_argument(
        "--age_of_onset", "-a", default=None,
        help="Only return phenotypes with this age_of_onset.")
    parser.add_argument(
        "--type", "-T", default=None,
        help="Only return phenotypes with this type.")