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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 _do(name, gnome_kwargs, preferences):
    '''
    worker function for the others to use
    this handles all the gsetting magic
    '''
    ret = {'name': name,
           'result': True,
           'changes': {},
           'comment': ''}

    messages = []

    for pref in preferences:
        key = pref
        value = preferences[pref]

        if isinstance(value, bool):
            ftype = 'boolean'

            # need to convert boolean values to strings and make lowercase to
            # pass to gsettings
            value = six.text_type(value).lower()

        elif isinstance(value, int):
            ftype = 'int'
        elif isinstance(value, six.string_types):
            ftype = 'string'
        else:
            ftype = 'string'

        gnome_kwargs.update({'key': key, 'value': value})

        if _check_current_value(gnome_kwargs, value):
            messages.append('{0} is already set to {1}'.format(key, value))
        else:
            result = __salt__['gnome.set'](**gnome_kwargs)
            if result['retcode'] == 0:
                messages.append('Setting {0} to {1}'.format(key, value))
                ret['changes'][key] = '{0}:{1}'.format(key, value)
                ret['result'] = True
            else:
                messages.append(result['stdout'])
                ret['result'] = False

        ret['comment'] = ', '.join(messages)

    return ret