def delete(self, key):
(_value, mem) = LRUCache.get(self, key)<EOL>self._mem -= mem<EOL>LRUCache.delete(self, key)<EOL>
>>> c = MemSizeLRUCache()
>>> c.put(1, 1)
>>> c.mem()
24
>>> c.delete(1)
>>> c.mem()
0