Issue python#7766: Change sys.getwindowsversion() return value to a n…

…amed tuple and add the additional members returned in an OSVERSIONINFOEX structure. The new members are service_pack_major, service_pack_minor, suite_mask, and product_type.

Doc/library/sys.rst

@@ -470,9 +470,15 @@ always available.
 
 .. function:: getwindowsversion()
 
-   Return a tuple containing five components, describing the Windows version
-   currently running.  The elements are *major*, *minor*, *build*, *platform*, and
-   *text*.  *text* contains a string while all other values are integers.
+   Return a named tuple containing describing the Windows version
+   currently running.  The named elements are *major*, *minor*,
+   *build*, *platform*, *service_pack*, *service_pack_minor*,
+   *service_pack_major*, *suite_mask*, and *product_type*.
+   *service_pack* contains a string while all other values are
+   integers. The components can also be accessed by name, so
+   ``sys.getwindowsversion()[0]`` is equivalent to
+   ``sys.getwindowsversion().major``. For compatibility with prior
+   versions, only the first 5 elements are retrievable by indexing.
 
    *platform* may be one of the following values:
 
@@ -488,12 +494,31 @@ always available.
    | :const:`3 (VER_PLATFORM_WIN32_CE)`      | Windows CE              |
    +-----------------------------------------+-------------------------+
 
-   This function wraps the Win32 :cfunc:`GetVersionEx` function; see the Microsoft
-   documentation for more information about these fields.
+   *product_type* may be one of the following values:
+
+   +---------------------------------------+---------------------------------+
+   | Constant                              | Meaning                         |
+   +=======================================+=================================+
+   | :const:`1 (VER_NT_WORKSTATION)`       | The system is a workstation.    |
+   +---------------------------------------+---------------------------------+
+   | :const:`2 (VER_NT_DOMAIN_CONTROLLER)` | The system is a domain          |
+   |                                       | controller.                     |
+   +---------------------------------------+---------------------------------+
+   | :const:`3 (VER_NT_SERVER)`            | The system is a server, but not |
+   |                                       | a domain controller.            |
+   +---------------------------------------+---------------------------------+
+
+
+   This function wraps the Win32 :cfunc:`GetVersionEx` function; see the
+   Microsoft documentation on :cfunc:`OSVERSIONINFOEX` for more information
+   about these fields.
 
    Availability: Windows.
 
    .. versionadded:: 2.3
+   .. versionchanged:: 2.7
+      Changed to a named tuple and added *service_pack_minor*,
+      *service_pack_major*, *suite_mask*, and *product_type*.
 
 
 .. data:: hexversion

Lib/test/test_sys.py

@@ -2,6 +2,7 @@
 import unittest, test.test_support
 import sys, cStringIO, os
 import struct
+import operator
 
 class SysModuleTest(unittest.TestCase):
 
@@ -205,13 +206,28 @@ def test_recursionlimit(self):
     def test_getwindowsversion(self):
         if hasattr(sys, "getwindowsversion"):
             v = sys.getwindowsversion()
-            self.assertIsInstance(v, tuple)
+            self.assertTrue(isinstance(v[:], tuple))
             self.assertEqual(len(v), 5)
             self.assertIsInstance(v[0], int)
             self.assertIsInstance(v[1], int)
             self.assertIsInstance(v[2], int)
             self.assertIsInstance(v[3], int)
             self.assertIsInstance(v[4], str)
+            self.assertRaises(IndexError, operator.getitem, v, 5)
+            self.assertIsInstance(v.major, int)
+            self.assertIsInstance(v.minor, int)
+            self.assertIsInstance(v.build, int)
+            self.assertIsInstance(v.platform, int)
+            self.assertIsInstance(v.service_pack, str)
+            self.assertEqual(v[0], v.major)
+            self.assertEqual(v[1], v.minor)
+            self.assertEqual(v[2], v.build)
+            self.assertEqual(v[3], v.platform)
+            self.assertEqual(v[4], v.service_pack)
+
+            # This is how platform.py calls it. Make sure tuple
+            #  still has 5 elements
+            maj, min, buildno, plat, csd = sys.getwindowsversion()
 
     def test_dlopenflags(self):
         if hasattr(sys, "setdlopenflags"):

Misc/NEWS

@@ -12,6 +12,11 @@ What's New in Python 2.7 alpha 3?
 Core and Builtins
 -----------------
 
+- Issue #7766: Change sys.getwindowsversion() return value to a named
+  tuple and add the additional members returned in an OSVERSIONINFOEX
+  structure. The new members are service_pack_major, service_pack_minor,
+  suite_mask, and product_type.
+
 - Issue #7561: Operations on empty bytearrays (such as `int(bytearray())`)
   could crash in many places because of the PyByteArray_AS_STRING() macro
   returning NULL.  The macro now returns a statically allocated empty

Python/sysmodule.c

@@ -557,26 +557,65 @@ recursion from causing an overflow of the C stack and crashing Python."
 PyDoc_STRVAR(getwindowsversion_doc,
 "getwindowsversion()\n\
 \n\
-Return information about the running version of Windows.\n\
-The result is a tuple of (major, minor, build, platform, text)\n\
-All elements are numbers, except text which is a string.\n\
-Platform may be 0 for win32s, 1 for Windows 9x/ME, 2 for Windows NT/2000/XP\n\
-"
+Return information about the running version of Windows as a named tuple.\n\
+The members are named: major, minor, build, platform, service_pack,\n\
+service_pack_major, service_pack_minor, suite_mask, and product_type. For\n\
+backward compatibiliy, only the first 5 items are available by indexing.\n\
+All elements are numbers, except service_pack which is a string. Platform\n\
+may be 0 for win32s, 1 for Windows 9x/ME, 2 for Windows NT/2000/XP/Vista/7,\n\
+3 for Windows CE. Product_type may be 1 for a workstation, 2 for a domain\n\
+controller, 3 for a server."
 );
 
+static PyTypeObject WindowsVersionType = {0, 0, 0, 0, 0, 0};
+
+static PyStructSequence_Field windows_version_fields[] = {
+	{"major", "Major version number"},
+	{"minor", "Minor version number"},
+	{"build", "Build number"},
+	{"platform", "Operating system platform"},
+	{"service_pack", "Latest Service Pack installed on the system"},
+	{"service_pack_major", "Service Pack major version number"},
+	{"service_pack_minor", "Service Pack minor version number"},
+	{"suite_mask", "Bit mask identifying available product suites"},
+	{"product_type", "System product type"},
+	{0}
+};
+
+static PyStructSequence_Desc windows_version_desc = {
+	"sys.getwindowsversion",  /* name */
+	getwindowsversion_doc,    /* doc */
+	windows_version_fields,   /* fields */
+	5                         /* For backward compatibility,
+                                     only the first 5 items are accessible
+                                     via indexing, the rest are name only */
+};
+
 static PyObject *
 sys_getwindowsversion(PyObject *self)
 {
-	OSVERSIONINFO ver;
+	PyObject *version;
+	int pos = 0;
+	OSVERSIONINFOEX ver;
 	ver.dwOSVersionInfoSize = sizeof(ver);
-	if (!GetVersionEx(&ver))
+	if (!GetVersionEx((OSVERSIONINFO*) &ver))
 		return PyErr_SetFromWindowsErr(0);
-	return Py_BuildValue("HHHHs",
-	                     ver.dwMajorVersion,
-	                     ver.dwMinorVersion,
-	                     ver.dwBuildNumber,
-	                     ver.dwPlatformId,
-	                     ver.szCSDVersion);
+
+	version = PyStructSequence_New(&WindowsVersionType);
+	if (version == NULL)
+		return NULL;
+
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.dwMajorVersion));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.dwMinorVersion));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.dwBuildNumber));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.dwPlatformId));
+	PyStructSequence_SET_ITEM(version, pos++, PyString_FromString(ver.szCSDVersion));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.wServicePackMajor));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.wServicePackMinor));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.wSuiteMask));
+	PyStructSequence_SET_ITEM(version, pos++, PyInt_FromLong(ver.wProductType));
+
+	return version;
 }
 
 #endif /* MS_WINDOWS */
@@ -1499,6 +1538,16 @@ _PySys_Init(void)
 	FlagsType.tp_init = NULL;
 	FlagsType.tp_new = NULL;
 
+
+#if defined(MS_WINDOWS)
+	/* getwindowsversion */
+	if (WindowsVersionType.tp_name == 0)
+		PyStructSequence_InitType(&WindowsVersionType, &windows_version_desc);
+	/* prevent user from creating new instances */
+	WindowsVersionType.tp_init = NULL;
+	WindowsVersionType.tp_new = NULL;
+#endif
+
 	/* float repr style: 0.03 (short) vs 0.029999999999999999 (legacy) */
 #ifndef PY_NO_SHORT_FLOAT_REPR
 	SET_SYS_FROM_STRING("float_repr_style",