From: Serhiy Storchaka <storchaka@gmail.com>
Date: Wed, 7 Dec 2016 11:31:20 +0000 (+0200)
Subject: Change order of io.UnsupportedOperation base classes.
X-Git-Tag: v3.5.3rc1~74
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=606ab86c0e11eb00fc276c694bff9d7f9239d538;p=python

Change order of io.UnsupportedOperation base classes.
This makes tests passing after changes by issue #5322.
---

diff --git a/Lib/_pyio.py b/Lib/_pyio.py
index 0d98b74476..f2fe447143 100644
--- a/Lib/_pyio.py
+++ b/Lib/_pyio.py
@@ -276,7 +276,7 @@ class OpenWrapper:
 try:
     UnsupportedOperation = io.UnsupportedOperation
 except AttributeError:
-    class UnsupportedOperation(ValueError, OSError):
+    class UnsupportedOperation(OSError, ValueError):
         pass
 
 
diff --git a/Modules/_io/_iomodule.c b/Modules/_io/_iomodule.c
index 65c955ac69..e9f22afb50 100644
--- a/Modules/_io/_iomodule.c
+++ b/Modules/_io/_iomodule.c
@@ -654,7 +654,7 @@ PyInit__io(void)
     /* UnsupportedOperation inherits from ValueError and IOError */
     state->unsupported_operation = PyObject_CallFunction(
         (PyObject *)&PyType_Type, "s(OO){}",
-        "UnsupportedOperation", PyExc_ValueError, PyExc_IOError);
+        "UnsupportedOperation", PyExc_OSError, PyExc_ValueError);
     if (state->unsupported_operation == NULL)
         goto fail;
     Py_INCREF(state->unsupported_operation);