old_contents: from __future__ import unicode_literals
  
  from django.db import models
  from django.utils.encoding import python_2_unicode_compatible
  from django.utils.translation import ugettext_lazy as _
  
  from model_utils.models import TimeStampedModel
  
  from ..base import behaviours
  from .managers import CategoryManager
  
  
  @python_2_unicode_compatible
  class Category(behaviours.Permalinkable,
                 behaviours.Authorable,
                 TimeStampedModel):
  
      name = models.CharField(_('Name'), max_length=100)
  
      description = models.TextField(_('Description'), null=True, blank=True)
  
      objects = CategoryManager()
  
      class Meta:
          app_label = 'kb'
          verbose_name = _('Category')
          verbose_name_plural = _('Categories')
  
      def __str__(self):
          return self.name
  
      def published_articles(self, number=5):
          return self.articles.published().order_by('-created')[:number]
  
new_contents: from __future__ import unicode_literals
  
  from django.db import models
  from django.utils.encoding import python_2_unicode_compatible
  from django.utils.translation import ugettext_lazy as _
  
  from model_utils.models import TimeStampedModel
  
  from ..base import behaviours
  from .managers import CategoryManager
  
  
  @python_2_unicode_compatible
  class Category(behaviours.Permalinkable,
                 behaviours.Authorable,
                 TimeStampedModel):
  
      name = models.CharField(_('Name'), max_length=100)
  
      description = models.TextField(_('Description'), null=True, blank=True)
  
      objects = CategoryManager()
  
      class Meta:
          app_label = 'kb'
          verbose_name = _('Category')
          verbose_name_plural = _('Categories')
  
      def __str__(self):
          return self.name
  
      def published_articles(self, number=4):
          return self.articles.published().order_by('-created')[:number]
  
subject: change default number articles