From 534837e1ee34341727e3f424923e3aebbfda245e Mon Sep 17 00:00:00 2001
From: speezepearson <speezepearson@users.noreply.github.com>
Date: Wed, 13 Jul 2016 15:26:55 -0700
Subject: [PATCH] add __{cause,context,traceback}__ to BaseException, per PEP
 3134 (#369)

---
 stdlib/3/builtins.pyi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/stdlib/3/builtins.pyi b/stdlib/3/builtins.pyi
index 291296aed..3188aa7ef 100644
--- a/stdlib/3/builtins.pyi
+++ b/stdlib/3/builtins.pyi
@@ -7,6 +7,7 @@ from typing import (
     SupportsAbs, SupportsRound, IO, Union, ItemsView, KeysView, ValuesView, ByteString
 )
 from abc import abstractmethod, ABCMeta
+from types import TracebackType
 
 # Note that names imported above are not automatically made visible via the
 # implicit builtins import.
@@ -751,6 +752,9 @@ Ellipsis = ...  # type: ellipsis
 
 class BaseException:
     args = ...  # type: Any
+    __cause__ = ... # type: BaseException
+    __context__ = ... # type: BaseException
+    __traceback__ = ... # type: TracebackType
     def __init__(self, *args: Any) -> None: ...
     def with_traceback(self, tb: Any) -> BaseException: ...