Update lru_cache.py

Author: lighting9999

other/lru_cache.py

@@ -1,13 +1,9 @@
 from __future__ import annotations
 
 from collections.abc import Callable
-from typing import Generic, TypeVar
 
-T = TypeVar("T")
-U = TypeVar("U")
 
-
-class DoubleLinkedListNode(Generic[T, U]):
+class DoubleLinkedListNode[T, U]:
     """
     Double Linked List Node built specifically for LRU Cache
 
@@ -28,7 +24,7 @@ def __repr__(self) -> str:
         )
 
 
-class DoubleLinkedList(Generic[T, U]):
+class DoubleLinkedList[T, U]:
     """
     Double Linked List built specifically for LRU Cache
 
@@ -143,7 +139,7 @@ def remove(
         return node
 
 
-class LRUCache(Generic[T, U]):
+class LRUCache[T, U]:
     """
     LRU Cache to store a given capacity of data. Can be used as a stand-alone object
     or as a function decorator.
@@ -227,8 +223,7 @@ def __repr__(self) -> str:
             f"CacheInfo(hits={self.hits}, misses={self.miss}, "
             f"capacity={self.capacity}, current size={self.num_keys})"
         )
-
-    def __contains__(self, key: T) -> bool:
+            def __contains__(self, key: T) -> bool:
         """
         >>> cache = LRUCache(1)