old_contents: # devstack_appsembler.py
  
  from .devstack import *
  from .appsembler import *
  
  INSTALLED_APPS += ('appsembler',)
  DEFAULT_TEMPLATE_ENGINE['OPTIONS']['context_processors'] += ('appsembler.context_processors.intercom',)
  
new_contents: # devstack_appsembler.py
  
  from .devstack import *
  from .appsembler import *
  
  # disable caching in dev environment
  for cache_key in CACHES.keys():
      CACHES[cache_key]['BACKEND'] = 'django.core.cache.backends.dummy.DummyCache'
  
  SESSION_ENGINE = 'django.contrib.sessions.backends.db'
  
  INSTALLED_APPS += ('appsembler',)
  DEFAULT_TEMPLATE_ENGINE['OPTIONS']['context_processors'] += ('appsembler.context_processors.intercom',)
  
subject: disable cache in devstack