code: def set_to_cache(vk):
          
          v, k = vk
  
          try:
              cache.set(k, json.dumps(v), settings.CACHE_EXPIRE_DURATION)
          except Exception as e:
              pass
              # todo should add log.error()
          return v, k
docs: Args:
              vk (tuple): obj data (dict), obj key(str)
  
          Return:
              tuple: value (dict), key (string)