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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 list_mirrors(config_path=_DEFAULT_CONFIG_PATH):
    '''
    Get a list of all the mirrored remote repositories.

    :param str config_path: The path to the configuration file for the aptly instance.

    :return: A list of the mirror names.
    :rtype: list

    CLI Example:

    .. code-block:: bash

        salt '*' aptly.list_mirrors
    '''
    _validate_config(config_path)

    cmd = ['mirror', 'list', '-config={}'.format(config_path), '-raw=true']

    cmd_ret = _cmd_run(cmd)
    ret = [line.strip() for line in cmd_ret.splitlines()]

    log.debug('Found mirrors: %s', len(ret))
    return ret