new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from django.conf import settings
  from base64 import b64encode
  
  
  def _cache_key(_type, model, site, channel_long_slug):
      return b64encode((u'{}:{}:{}:{}:{}'.format(
          _type,
          settings.OPPS_CACHE_PREFIX,
          model._meta.db_table,
          site,
          channel_long_slug)).replace(' ', ''))
  
subject: Create cache key generate