Add xxlimited import and skip test if unavailable for method_get METH_METHOD

Author: sunmy2019

Lib/test/test_descr.py

@@ -28,6 +28,11 @@
 except ImportError:
     xxsubtype = None
 
+try:
+    import xxlimited
+except ImportError:
+    xxlimited = None
+
 
 class OperatorsTest(unittest.TestCase):
 
@@ -1803,6 +1808,8 @@ class SubSpam(spam.spamlist): pass
             spam_cm.__get__(None, list)
         self.assertEqual(str(cm.exception), expected_errmsg)
 
+    @support.impl_detail("the module 'xxlimited' is internal")
+    @unittest.skipIf(xxlimited is None, "requires xxlimited module")
     def test_method_get_meth_method_invalid_type(self):
         # gh-146615: method_get() for METH_METHOD descriptors used to pass
         # Py_TYPE(type)->tp_name as the %V fallback instead of the separate
@@ -1812,9 +1819,6 @@ def test_method_get_meth_method_invalid_type(self):
         #
         # METH_METHOD|METH_FASTCALL|METH_KEYWORDS is the only flag combination
         # that enters the affected branch in method_get().
-
-        import xxlimited
-
         xxo = xxlimited.Xxo()
         descr = xxlimited.Xxo.demo