In Python 3, the __str__() method is called for string representation of your models rather than the awkward sounding __unicode__() method. This is one of the most evident ways of identifying Python 3 ported code:

class Person(models.Model):   
    name = models.TextField()   

    def __unicode__(self):   
        return self.name   

class Person(models.Model):
    name = models.TextField()

    def __str__(self):
        return self.name

This reflects the difference in the way Python 3 treats strings. In Python 2, the human readable representation of a class can be returned by __str__() (bytes) or __unicode__() (text). However, in Python 3, the readable representation is simply returned by __str__() (text).