new_contents: from cdf.config import DJANGO_VERSIONS, VERSION
  from cdf.jinja_utils import template_env
  
  
  class BasePageRenderer(object):
  
      def __init__(self, klasses):
          self.klasses = klasses
  
      def render(self, filename):
          template = template_env.get_template(self.template_name)
          context = self.get_context()
          rendered_template = template.render(context)
          with open(filename, 'w') as f:
              f.write(rendered_template)
  
      def get_context(self):
          other_versions = list(DJANGO_VERSIONS)
          other_versions.remove(VERSION)
          return {
              'version_prefix': 'Django',
              'version': VERSION,
              'versions': DJANGO_VERSIONS,
              'other_versions': other_versions,
              'klasses': self.klasses
          }
  
  
  class IndexPageRenderer(BasePageRenderer):
      template_name = 'index.html'
  
subject: Add base renderer and an index page renderer