From f6bbc46c35b4c54cc6dd3268062df447ac81e718 Mon Sep 17 00:00:00 2001
From: Kai Lautaportti <kai.lautaportti@gmail.com>
Date: Sat, 22 Oct 2016 15:45:57 -0700
Subject: [PATCH] Fix functools.lru_cache() type hint to allow maxsize=None
 (#627)

---
 stdlib/3/functools.pyi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/3/functools.pyi b/stdlib/3/functools.pyi
index 2bd79ef71..c24faf811 100644
--- a/stdlib/3/functools.pyi
+++ b/stdlib/3/functools.pyi
@@ -28,7 +28,7 @@ class _lru_cache_wrapper(Generic[_T]):
     def cache_info(self) -> CacheInfo: ...
 
 class lru_cache():
-    def __init__(self, maxsize: int = ..., typed: bool = ...) -> None:
+    def __init__(self, maxsize: Optional[int] = ..., typed: bool = ...) -> None:
         pass
     def __call__(self, f: Callable[..., _T]) -> _lru_cache_wrapper[_T]: ...