From c5bc3bd7fa532cd4b71af3a39e832891e068326e Mon Sep 17 00:00:00 2001
From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Mon, 11 Jun 2018 14:03:02 -0700
Subject: [PATCH] make contextvars.Context instantiable (#2119)

Part of #1476.
---
 stdlib/3.7/contextvars.pyi | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/stdlib/3.7/contextvars.pyi b/stdlib/3.7/contextvars.pyi
index b5c8082aa..6fe499e34 100644
--- a/stdlib/3.7/contextvars.pyi
+++ b/stdlib/3.7/contextvars.pyi
@@ -1,4 +1,4 @@
-from typing import Any, Callable, ClassVar, Generic, Mapping, TypeVar, Union
+from typing import Any, Callable, ClassVar, Generic, Iterator, Mapping, TypeVar, Union
 
 _T = TypeVar('_T')
 
@@ -25,3 +25,6 @@ class Context(Mapping[ContextVar[Any], Any]):
     def __init__(self) -> None: ...
     def run(self, callable: Callable[..., _T], *args: Any, **kwargs: Any) -> _T: ...
     def copy(self) -> Context: ...
+    def __getitem__(self, key: ContextVar[Any]) -> Any: ...
+    def __iter__(self) -> Iterator[ContextVar[Any]]: ...
+    def __len___(self) -> int: ...