old_contents: from django.db import models
  from django_countries import CountryField
  
  
  class Address(models.Model):
      """
      A postal address.
      """
  
      address_line1 = models.CharField(max_length=100, blank=True)
      address_line2 = models.CharField(max_length=100, blank=True)
      city = models.CharField(max_length=100, blank=True)
      state = models.CharField(max_length=100, blank=True)
      country = CountryField(blank=True)
      zip_code = models.CharField(max_length=20, blank=True)
  
      def __unicode__(self):
          return self.address_line1[:80]
  
      class Meta:
          abstract = True
  
new_contents: from django.db import models
  from django_countries import CountryField
  
  
  class Address(models.Model):
      """
      A postal address.
      """
      line1 = models.CharField(max_length=100, blank=True)
      line2 = models.CharField(max_length=100, blank=True)
      city = models.CharField(max_length=100, blank=True)
      state = models.CharField(max_length=100, blank=True)
      country = CountryField(blank=True)
      zip_code = models.CharField(max_length=20, blank=True)
  
      def __unicode__(self):
          return self.address_line1[:80]
  
      class Meta:
          abstract = True
  
subject: Remove the address_ prefix from line1 and line2 in the Address model.