code: def decrement(self, key, cache=None, amount=1):
          
          amount = amount * -1
  
          return self.increment(key=key, cache=cache, amount=amount)
docs: A convenience function for passing negative values to increment.
  
          Keyword arguments:
          key -- the key the item is stored under. Required.
          cache -- the cache the item belongs to. Defaults to None, which uses
                   self.name. If no name is set, raises a ValueError.
          amount -- the amount to decrement the value by. Can be negative to
                    increment the value. Defaults to 1.