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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 extract_symbol_app(parser, _, args):
 # pragma: no cover """ Extract a symbol from an ELF file. """


    parser.add_argument('file', help='ELF file to extract a symbol from')
    parser.add_argument('symbol', help='the symbol to extract')
    args = parser.parse_args(args)
    return ELF(args.file).get_symbol(args.symbol).content