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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 install_from_exchange():
    ''' Install from experiment exchange. '''
    parser = argparse.ArgumentParser(
        description='Download experiment from the psiturk.org experiment\
        exchange (http://psiturk.org/ee).'
    )
    parser.add_argument(
        'exp_id', metavar='exp_id', type=str, help='the id number of the\
        experiment in the exchange'
    )
    args = parser.parse_args()
    exp_exch = ExperimentExchangeServices()
    exp_exch.download_experiment(args.exp_id)