old_contents: from __future__ import absolute_import, unicode_literals
  
  from .production import *
  
  CACHES = {
      'default': {
          'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
      }
  }
  
  IS_PRODUCTION = False
  
new_contents: from __future__ import absolute_import, unicode_literals
  
  from .production import *
  
  # CACHES = {
  #     'default': {
  #         'BACKEND': 'django.core.cache.backends.locmem.LocMemCache',
  #     }
  # }
  
  IS_PRODUCTION = False
  
subject: Use redis on staging.