<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def slaveof(name, sentinel_host=None, sentinel_port=None, sentinel_password=None, **connection_args):
    '''
    Set this redis instance as a slave.

    .. versionadded: 2016.3.0

    name
        Master to make this a slave of

    sentinel_host
        Ip of the sentinel to check for the master

    sentinel_port
        Port of the sentinel to check for the master

    '''
    ret = {'name': name,
           'changes': {},
           'result': False,
           'comment': 'Failed to setup slave'}

    kwargs = copy.copy(connection_args)
    sentinel_master = __salt__['redis.sentinel_get_master_ip'](name, sentinel_host, sentinel_port, sentinel_password)
    if sentinel_master['master_host'] in __salt__['network.ip_addrs']():
        ret['result'] = True
        ret['comment'] = 'Minion is the master: {0}'.format(name)
        return ret

    first_master = __salt__['redis.get_master_ip'](**connection_args)
    if first_master == sentinel_master:
        ret['result'] = True
        ret['comment'] = 'Minion already slave of master: {0}'.format(name)
        return ret

    if __opts__['test'] is True:
        ret['comment'] = 'Minion will be made a slave of {0}: {1}'.format(name, sentinel_master['host'])
        ret['result'] = None
        return ret

    kwargs.update(**sentinel_master)
    __salt__['redis.slaveof'](**kwargs)

    current_master = __salt__['redis.get_master_ip'](**connection_args)
    if current_master != sentinel_master:
        return ret

    ret['result'] = True
    ret['changes'] = {
        'old': first_master,
        'new': current_master,
    }
    ret['comment'] = 'Minion successfully connected to master: {0}'.format(name)

    return ret