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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 make(parser):
 """ Gather authentication keys for provisioning new nodes. """

    parser.add_argument(
        'mon',
        metavar='HOST',
        nargs='+',
        help='monitor host to pull keys from',
        )
    parser.set_defaults(
        func=gatherkeys,
        )