https://github.com/python/cpython/commit/b9d43188e93967c3695e60f5ea6d8c2ca8a62c5d
commit: b9d43188e93967c3695e60f5ea6d8c2ca8a62c5d
branch: main
author: Victor Stinner <[email protected]>
committer: vstinner <[email protected]>
date: 2026-03-19T00:28:21+01:00
summary:
gh-145410: Add _sysconfig.get_platform() function (#146145)
On Windows, sysconfig.get_platform() now gets the platform from the
_sysconfig module instead of parsing sys.version string.
files:
A Misc/NEWS.d/next/Library/2026-03-18-23-54-36.gh-issue-145410.NvLWj5.rst
M Lib/sysconfig/__init__.py
M Lib/test/test_sysconfig.py
M Modules/_sysconfig.c
M Modules/clinic/_sysconfig.c.h
diff --git a/Lib/sysconfig/__init__.py b/Lib/sysconfig/__init__.py
index 8ff9c99435bb1a..6507a7b5b0f695 100644
--- a/Lib/sysconfig/__init__.py
+++ b/Lib/sysconfig/__init__.py
@@ -665,12 +665,10 @@ def get_platform():
For other non-POSIX platforms, currently just returns
:data:`sys.platform`."""
if os.name == 'nt':
- if 'amd64' in sys.version.lower():
- return 'win-amd64'
- if '(arm)' in sys.version.lower():
- return 'win-arm32'
- if '(arm64)' in sys.version.lower():
- return 'win-arm64'
+ import _sysconfig
+ platform = _sysconfig.get_platform()
+ if platform:
+ return platform
return sys.platform
if os.name != "posix" or not hasattr(os, 'uname'):
diff --git a/Lib/test/test_sysconfig.py b/Lib/test/test_sysconfig.py
index 502103ce629358..e43f91eb9238f9 100644
--- a/Lib/test/test_sysconfig.py
+++ b/Lib/test/test_sysconfig.py
@@ -7,6 +7,7 @@
import shutil
import json
import textwrap
+from unittest.mock import patch
from copy import copy
from test import support
@@ -247,19 +248,15 @@ def test_get_platform(self):
self.assertIsInstance(actual_platform, str)
self.assertTrue(actual_platform)
- # windows XP, 32bits
+ # Windows
os.name = 'nt'
- sys.version = ('2.4.4 (#71, Oct 18 2006, 08:34:43) '
- '[MSC v.1310 32 bit (Intel)]')
- sys.platform = 'win32'
- self.assertEqual(get_platform(), 'win32')
-
- # windows XP, amd64
- os.name = 'nt'
- sys.version = ('2.4.4 (#71, Oct 18 2006, 08:34:43) '
- '[MSC v.1310 32 bit (Amd64)]')
- sys.platform = 'win32'
- self.assertEqual(get_platform(), 'win-amd64')
+ with patch('_sysconfig.get_platform', create=True,
return_value='win32'):
+ self.assertEqual(get_platform(), 'win32')
+ with patch('_sysconfig.get_platform', create=True,
return_value='win-amd64'):
+ self.assertEqual(get_platform(), 'win-amd64')
+ sys.platform = 'test-plaform'
+ with patch('_sysconfig.get_platform', create=True, return_value=None):
+ self.assertEqual(get_platform(), 'test-plaform')
# macbook
os.name = 'posix'
diff --git
a/Misc/NEWS.d/next/Library/2026-03-18-23-54-36.gh-issue-145410.NvLWj5.rst
b/Misc/NEWS.d/next/Library/2026-03-18-23-54-36.gh-issue-145410.NvLWj5.rst
new file mode 100644
index 00000000000000..8d84b70097d3e2
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2026-03-18-23-54-36.gh-issue-145410.NvLWj5.rst
@@ -0,0 +1,3 @@
+On Windows, :func:`sysconfig.get_platform` now gets the platform from the
+``_sysconfig`` module instead of parsing :data:`sys.version` string. Patch
+by Victor Stinner.
diff --git a/Modules/_sysconfig.c b/Modules/_sysconfig.c
index 345498e670dd6a..bcb9d108174f43 100644
--- a/Modules/_sysconfig.c
+++ b/Modules/_sysconfig.c
@@ -81,11 +81,48 @@ _sysconfig_config_vars_impl(PyObject *module)
return config;
}
+#ifdef MS_WINDOWS
+/*[clinic input]
+_sysconfig.get_platform
+
+Return a string that identifies the current platform.
+[clinic start generated code]*/
+
+static PyObject *
+_sysconfig_get_platform_impl(PyObject *module)
+/*[clinic end generated code: output=4ecbbe2b77633f3e input=c0b43abda44f9a01]*/
+{
+#ifdef MS_WIN64
+# if defined(_M_X64) || defined(_M_AMD64)
+# define SYSCONFIG_PLATFORM "win-amd64"
+# elif defined(_M_ARM64)
+# define SYSCONFIG_PLATFORM "win-arm64"
+# endif
+#endif
+
+#if defined(MS_WIN32) && !defined(MS_WIN64)
+# if defined(_M_IX86)
+# define SYSCONFIG_PLATFORM "win32"
+# elif defined(_M_ARM)
+# define SYSCONFIG_PLATFORM "win-arm32"
+# endif
+#endif
+
+#ifdef SYSCONFIG_PLATFORM
+ return PyUnicode_FromString(SYSCONFIG_PLATFORM);
+#else
+ Py_RETURN_NONE;
+#endif
+}
+#endif // MS_WINDOWS
+
+
PyDoc_STRVAR(sysconfig__doc__,
"A helper for the sysconfig module.");
static struct PyMethodDef sysconfig_methods[] = {
_SYSCONFIG_CONFIG_VARS_METHODDEF
+ _SYSCONFIG_GET_PLATFORM_METHODDEF
{NULL, NULL}
};
diff --git a/Modules/clinic/_sysconfig.c.h b/Modules/clinic/_sysconfig.c.h
index eb3d396298bb21..031a738cf47c7b 100644
--- a/Modules/clinic/_sysconfig.c.h
+++ b/Modules/clinic/_sysconfig.c.h
@@ -19,4 +19,30 @@ _sysconfig_config_vars(PyObject *module, PyObject
*Py_UNUSED(ignored))
{
return _sysconfig_config_vars_impl(module);
}
-/*[clinic end generated code: output=25d395cf02eced1f input=a9049054013a1b77]*/
+
+#if defined(MS_WINDOWS)
+
+PyDoc_STRVAR(_sysconfig_get_platform__doc__,
+"get_platform($module, /)\n"
+"--\n"
+"\n"
+"Return a string that identifies the current platform.");
+
+#define _SYSCONFIG_GET_PLATFORM_METHODDEF \
+ {"get_platform", (PyCFunction)_sysconfig_get_platform, METH_NOARGS,
_sysconfig_get_platform__doc__},
+
+static PyObject *
+_sysconfig_get_platform_impl(PyObject *module);
+
+static PyObject *
+_sysconfig_get_platform(PyObject *module, PyObject *Py_UNUSED(ignored))
+{
+ return _sysconfig_get_platform_impl(module);
+}
+
+#endif /* defined(MS_WINDOWS) */
+
+#ifndef _SYSCONFIG_GET_PLATFORM_METHODDEF
+ #define _SYSCONFIG_GET_PLATFORM_METHODDEF
+#endif /* !defined(_SYSCONFIG_GET_PLATFORM_METHODDEF) */
+/*[clinic end generated code: output=558531e148f92320 input=a9049054013a1b77]*/
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