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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 get_settings(category='All'):
    '''
    Get the current configuration for all audit settings specified in the
    category

    Args:
        category (str):
            One of the nine categories to return. Can also be ``All`` to return
            the settings for all categories. Valid options are:

            - Account Logon
            - Account Management
            - Detailed Tracking
            - DS Access
            - Logon/Logoff
            - Object Access
            - Policy Change
            - Privilege Use
            - System
            - All

            Default value is ``All``

    Returns:
        dict: A dictionary containing all subcategories for the specified
            category along with their current configuration

    Raises:
        KeyError: On invalid category
        CommandExecutionError: If an error is encountered retrieving the settings

    Usage:

    .. code-block:: python

        import salt.utils.win_lgpo_auditpol

        # Get current state of all audit settings
        salt.utils.win_lgpo_auditpol.get_settings()

        # Get the current state of all audit settings in the "Account Logon"
        # category
        salt.utils.win_lgpo_auditpol.get_settings(category="Account Logon")
    '''
    # Parameter validation
    if category.lower() in ['all', '*']:
        category = '*'
    elif category.lower() not in [x.lower() for x in categories]:
        raise KeyError('Invalid category: "{0}"'.format(category))

    cmd = '/get /category:"{0}"'.format(category)
    results = _auditpol_cmd(cmd)

    ret = {}
    # Skip the first 2 lines
    for line in results[3:]:
        if '  ' in line.strip():
            ret.update(dict(list(zip(*[iter(re.split(r"\s{2,}", line.strip()))]*2))))
    return ret