Sep 8, 2025 · Aug 1, 2025 · Aug 6, 2025 · Aug 7, 2025 · Aug 7, 2025 · Aug 7, 2025
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
   *debug* is a boolean indicating whether the interpreter was built in
   :ref:`debug mode <debug-build>`, i.e. with the :option:`--with-pydebug` option.

   *byteorder* is a string indicating the native byte order, either ``'big'`` or
   ``'little'``.  This is the same as the :data:`byteorder` attribute.

   .. versionadded:: next


diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
        self.assertEqual(len(info.__dict__), 3)
        pointer_bits = 64 if sys.maxsize > 2**32 else 32
        self.assertEqual(info.pointer_bits, pointer_bits)
        self.assertEqual(info.byteorder, sys.byteorder)
        for attr, flag in [
            ("free_threaded", "Py_GIL_DISABLED"),
            ("debug", "Py_REF_DEBUG"),
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
        goto error;
    }

 #if PY_BIG_ENDIAN
    value = PyUnicode_FromString("big");
 #else
    value = PyUnicode_FromString("little");
 #endif
    if (value == NULL) {
        goto error;
    }
    res = PyDict_SetItemString(abi_info, "byteorder", value);
    if (res < 0) {
        goto error;
    }
    Py_DECREF(value);

    ns = _PyNamespace_New(abi_info);
    Py_DECREF(abi_info);
    return ns;
Original file line number	Diff line number	Diff line change
Expand Up		@@ -38,6 +38,9 @@ always available. Unless explicitly noted otherwise, all variables are read-only
		debug is a boolean indicating whether the interpreter was built in
		:ref:`debug mode <debug-build>`, i.e. with the :option:`--with-pydebug` option.

		byteorder is a string indicating the native byte order, either ``'big'`` or
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		``'little'``. This is the same as the :data:`byteorder` attribute.
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		.. versionadded:: next
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Original file line number	Diff line number	Diff line change
Expand Up		@@ -744,6 +744,7 @@ def test_abi_info(self):
		self.assertEqual(len(info.__dict__), 3)
		pointer_bits = 64 if sys.maxsize > 2**32 else 32
		self.assertEqual(info.pointer_bits, pointer_bits)
		self.assertEqual(info.byteorder, sys.byteorder)
		for attr, flag in [
		("free_threaded", "Py_GIL_DISABLED"),
		("debug", "Py_REF_DEBUG"),
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Original file line number	Diff line number	Diff line change
Expand Up		@@ -3680,6 +3680,20 @@ make_abi_info(void)
		goto error;
		}

		#if PY_BIG_ENDIAN
		value = PyUnicode_FromString("big");
		#else
		value = PyUnicode_FromString("little");
		#endif
		if (value == NULL) {
		goto error;
		}
		res = PyDict_SetItemString(abi_info, "byteorder", value);
		if (res < 0) {
		goto error;
		}
		Py_DECREF(value);
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		ns = _PyNamespace_New(abi_info);
		Py_DECREF(abi_info);
		return ns;
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