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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 mapping_args(parser):
 """Add various variable mapping command line options to the parser"""

    parser.add_argument('--add-prefix',
                        dest='add_prefix',
                        help='Specify a prefix to use when '
                        'generating secret key names')
    parser.add_argument('--add-suffix',
                        dest='add_suffix',
                        help='Specify a suffix to use when '
                        'generating secret key names')
    parser.add_argument('--merge-path',
                        dest='merge_path',
                        action='store_true',
                        default=True,
                        help='merge vault path and key name')
    parser.add_argument('--no-merge-path',
                        dest='merge_path',
                        action='store_false',
                        default=True,
                        help='do not merge vault path and key name')
    parser.add_argument('--key-map',
                        dest='key_map',
                        action='append',
                        type=str,
                        default=[])