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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 run_configure(args):
 """Run a script to configure the current node."""

    config_path = args.config or bigchaindb.config_utils.CONFIG_DEFAULT_PATH

    config_file_exists = False
    # if the config path is `-` then it's stdout
    if config_path != '-':
        config_file_exists = os.path.exists(config_path)

    if config_file_exists and not args.yes:
        want = input_on_stderr('Config file `{}` exists, do you want to '
                               'override it? (cannot be undone) [y/N]: '.format(config_path))
        if want != 'y':
            return

    conf = copy.deepcopy(bigchaindb.config)

    # select the correct config defaults based on the backend
    print('Generating default configuration for backend {}'
          .format(args.backend), file=sys.stderr)
    database_keys = bigchaindb._database_keys_map[args.backend]
    conf['database'] = bigchaindb._database_map[args.backend]

    if not args.yes:
        for key in ('bind', ):
            val = conf['server'][key]
            conf['server'][key] = input_on_stderr('API Server {}? (default `{}`): '.format(key, val), val)

        for key in ('scheme', 'host', 'port'):
            val = conf['wsserver'][key]
            conf['wsserver'][key] = input_on_stderr('WebSocket Server {}? (default `{}`): '.format(key, val), val)

        for key in database_keys:
            val = conf['database'][key]
            conf['database'][key] = input_on_stderr('Database {}? (default `{}`): '.format(key, val), val)

        for key in ('host', 'port'):
            val = conf['tendermint'][key]
            conf['tendermint'][key] = input_on_stderr('Tendermint {}? (default `{}`)'.format(key, val), val)

    if config_path != '-':
        bigchaindb.config_utils.write_config(conf, config_path)
    else:
        print(json.dumps(conf, indent=4, sort_keys=True))
    print('Configuration written to {}'.format(config_path), file=sys.stderr)
    print('Ready to go!', file=sys.stderr)