Python 这是什么；返回unicode（self.creator）和#x2B"E；”&引用+；自我介绍标题“；你住在Django吗？

我正在学习关于使用Django/Python创建论坛的lightbird教程。下面是创建

线程

模型的代码

class Thread(models.Model):
    title = models.CharField(max_length=100)
    created = models.DateTimeField(auto_now_add=True)
    creator = models.ForeignKey(User, blank=True, null=True)
    modified = models.DateTimeField(auto_now=True)
    forum = models.ForeignKey(Forum)

    def __unicode__(self):
        return unicode(self.creator) + " - " + self.title

和

Post

模型：

class Post(models.Model):
    title = models.CharField(max_length=60)
    created = models.DateTimeField(auto_now_add=True)
    creator = models.ForeignKey(User, blank=True, null=True)
    thread = models.ForeignKey(Thread)
    body = models.TextField(max_length=10000)

    def __unicode__(self):
        return u"%s - %s - %s" % (self.creator, self.thread, self.title)

    def short(self):
        return u"%s - %s\n%s" % (self.creator, self.title, self.created.strftime("%b %d, %I:%M %p"))
    short.allow_tags = True

使用unicode函数后，我很难理解代码！我一直在使用unicode，同时以非常简单的形式创建模型，如：

class Post(models.Model):
    title = models.CharField(max_length=100)

    def __unicode__(self):
        return self.title

我理解这一点，但不理解上面模型中的代码。有人能给我解释一下吗。谢谢大家!

 unicode(self.creator) +\ #will call the __unicode__ method of the User class
 ' - ' +\ # will add a dash
 self.title #will add the title which is a string

那么第二个呢

  "%s"%some_var #will convert some_var to a string (call __str__ usually...may fall back on __unicode__ or something)

所以

将调用创建者的用户类上的

\uuuuuuu str\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

然后添加一个破折号和标题

\n
是一个结束行

并且
strftime
将时间戳转换为英语“MonthAbbrv.Day，24Hr:Minutes”

return u"%s - %s\n%s" % (self.creator, self.title, self.created.strftime("%b %d, %I:%M %p"))