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import sys
import types
import unittest
# bpo-46417: Test that structseq types used by the sys module are still
# valid when Py_Finalize()/Py_Initialize() are called multiple times.
class TestStructSeq(unittest.TestCase):
# test PyTypeObject members
def check_structseq(self, obj_type):
# ob_refcnt
self.assertGreaterEqual(sys.getrefcount(obj_type), 1)
# tp_base
self.assertTrue(issubclass(obj_type, tuple))
# tp_bases
self.assertEqual(obj_type.__bases__, (tuple,))
# tp_dict
self.assertIsInstance(obj_type.__dict__, types.MappingProxyType)
# tp_mro
self.assertEqual(obj_type.__mro__, (obj_type, tuple, object))
# tp_name
self.assertIsInstance(type.__name__, str)
# tp_subclasses
self.assertEqual(obj_type.__subclasses__(), [])
def test_sys_attrs(self):
for attr_name in (
'flags', # FlagsType
'float_info', # FloatInfoType
'hash_info', # Hash_InfoType
'int_info', # Int_InfoType
'thread_info', # ThreadInfoType
'version_info', # VersionInfoType
):
with self.subTest(attr=attr_name):
attr = getattr(sys, attr_name)
self.check_structseq(type(attr))
def test_sys_funcs(self):
func_names = ['get_asyncgen_hooks'] # AsyncGenHooksType
if hasattr(sys, 'getwindowsversion'):
func_names.append('getwindowsversion') # WindowsVersionType
for func_name in func_names:
with self.subTest(func=func_name):
func = getattr(sys, func_name)
obj = func()
self.check_structseq(type(obj))
try:
unittest.main()
except SystemExit as exc:
if exc.args[0] != 0:
raise
print("Tests passed")