From 8b6cd5c3f0b486bfa3609c4fdf4af3fdef6245d3 Mon Sep 17 00:00:00 2001
From: Ryan Morshead <ryan.morshead@gmail.com>
Date: Wed, 13 Nov 2019 11:09:30 -0800
Subject: [PATCH] ast.Dict keys can be None (#3462)

See https://greentreesnakes.readthedocs.io/en/latest/nodes.html#Dict
---
 stdlib/3/_ast.pyi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/3/_ast.pyi b/stdlib/3/_ast.pyi
index 8dfdfbafe..da9ac361d 100644
--- a/stdlib/3/_ast.pyi
+++ b/stdlib/3/_ast.pyi
@@ -209,7 +209,7 @@ class IfExp(expr):
     orelse: expr
 
 class Dict(expr):
-    keys: typing.List[expr]
+    keys: typing.List[Optional[expr]]
     values: typing.List[expr]
 
 class Set(expr):