From 8e42d91e774e75e1732e2d09d0dd26bd6609b38e Mon Sep 17 00:00:00 2001
From: Thomas Grainger <tagrain@gmail.com>
Date: Mon, 25 Nov 2019 09:26:28 +0000
Subject: [PATCH] address OSError hierarchy Fixes #311

---
 six.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/six.py b/six.py
index d0aece89f..19e2efbcf 100644
--- a/six.py
+++ b/six.py
@@ -28,6 +28,11 @@
 import sys
 import types
 
+try:
+    from select import error as select_error
+except ImportError:
+    select_error = None
+
 __author__ = "Benjamin Peterson <benjamin@python.org>"
 __version__ = "1.13.0"
 
@@ -43,6 +48,7 @@
     class_types = type,
     text_type = str
     binary_type = bytes
+    os_errors = OSError,
 
     MAXSIZE = sys.maxsize
 else:
@@ -71,6 +77,12 @@ def __len__(self):
             MAXSIZE = int((1 << 63) - 1)
         del X
 
+    os_errors = (
+        (EnvironmentError, select_error)
+        if select_error
+        else EnvironmentError,
+    )
+
 
 def _add_doc(func, doc):
     """Add documentation to a function."""