code: def get(key, adapter = MemoryAdapter):
  	'''
  	get the cache value
  	'''
  	try:
  		return pickle.loads(adapter().get(key))
  	except CacheExpiredException:
  		return Nonf get(key, adapter = MemoryAdapter):
  	'''
  	get the cache value
  	'''
  	try:
  		return pickle.loads(adapter().get(key))
  	except CacheExpiredException:
  		return None
docs: get the cache value