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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 main(args=None):
 """Call the CLI interface and wait for the result."""

    retcode = 0
    try:
        ci = CliInterface()
        args = ci.parser.parse_args()
        result = args.func(args)
        if result is not None:
            print(result)
        retcode = 0
    except Exception:
        retcode = 1
        traceback.print_exc()
    sys.exit(retcode)