                  self.size += 1
              # Add the new key and value
              new_node = Node(results)
              self.linked_list.append_to_front(new_node)
              self.lookup[query] = new_node 
</s> remove     REJECTED = 3 </s> add  </s> remove         ...
 </s> add         pass </s> remove     def move_to_front(self, node):  # ...
    def append_to_front(self, node):  # ...
    def remove_from_tail(self):  # ...
 </s> add     def move_to_front(self, node):
        pass

    def append_to_front(self, node):
        pass

    def remove_from_tail(self):
        pass </s> remove     def message_user(self, friend_id, message):  # ...
    def message_group(self, group_id, message):  # ...
    def send_friend_request(self, friend_id):  # ...
    def receive_friend_request(self, friend_id):  # ...
    def approve_friend_request(self, friend_id):  # ...
    def reject_friend_request(self, friend_id):  # ...
 </s> add     def message_user(self, friend_id, message):
        pass

    def message_group(self, group_id, message):
        pass

    def send_friend_request(self, friend_id):
        pass

    def receive_friend_request(self, friend_id):
        pass

    def approve_friend_request(self, friend_id):
        pass

    def reject_friend_request(self, friend_id):
        pass </s> remove     def __init__(self, db);
 </s> add     def __init__(self, db):
                  self.size += 1
              # Add the new key and value
              new_node = Node(results)
              self.linked_list.append_to_front(new_node)

keep keep keep keep replace
 Convert all .py files to be valid Python (#98) 
solutions/object_oriented_design/lru_cache/lru_cache.py