From 2601a12c886a2b5bb231a3ffe8bdf8f9f8c58f8f Mon Sep 17 00:00:00 2001
From: Matthias Kramm <kramm@google.com>
Date: Mon, 9 Nov 2015 14:06:49 -0800
Subject: [PATCH] fix return types in _io.pyi

---
 builtins/2.7/_io.pyi | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/builtins/2.7/_io.pyi b/builtins/2.7/_io.pyi
index a8119a877..e85da3317 100644
--- a/builtins/2.7/_io.pyi
+++ b/builtins/2.7/_io.pyi
@@ -87,13 +87,15 @@ class _TextIOBase(_IOBase):
     newlines = ...  # type: Union[str, unicode]
     encoding = ...  # type: Optional[str]
     def read(self, n: int = ...) -> str: ...
-    def write(self): ...
-    def detach(self): ...
+    def write(self) -> None:
+        raise UnsupportedOperation
+    def detach(self) -> None:
+        raise UnsupportedOperation
 
 class StringIO(_TextIOBase):
     line_buffering = ...  # type: bool
     def getvalue(self) -> str: ...
-    def __setstate__(self, state: tuple): ...
+    def __setstate__(self, state: tuple) -> None: ...
     def __getstate__(self) -> tuple: ...
 
 class TextIOWrapper(_TextIOBase):