youknowone · Sep 24, 2026 · Sep 22, 2026 · Sep 21, 2026 · Sep 21, 2026 · Sep 22, 2026
diff --git a/.cspell.dict/cpython.txt b/.cspell.dict/cpython.txt
@@ -153,6 +153,7 @@ mimalloc
 miscompiles
 mult
 multibytecodec
+mycmp
 mystricmp
 mystrnicmp
 nameobj
@@ -187,6 +188,8 @@ numkwonly
 numposorkw
 nvars
 obmalloc
+odict
+ODICT
 opname
 opnames
 orelse

diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Lib/test/test_abc.py b/Lib/test/test_abc.py
@@ -168,7 +168,6 @@ def method_two(self):
             msg = r"class C without an implementation for abstract methods 'method_one', 'method_two'"
             self.assertRaisesRegex(TypeError, msg, C)
 
-        @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: False is not true
         def test_abstractmethod_integration(self):
             for abstractthing in [abc.abstractmethod, abc.abstractproperty,
                                   abc.abstractclassmethod,

diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
@@ -2711,43 +2711,35 @@ def detach_readline(self):
         else:
             yield
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_tty(self):
         # Test input() functionality when wired to a tty
         self.check_input_tty("prompt", b"quux")
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_tty_non_ascii(self):
         # Check stdin/stdout encoding is used when invoking PyOS_Readline()
         self.check_input_tty("prompté", b"quux\xc3\xa9", "utf-8")
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_tty_non_ascii_unicode_errors(self):
         # Check stdin/stdout error handler is used when invoking PyOS_Readline()
         self.check_input_tty("prompté", b"quux\xe9", "ascii")
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_tty_null_in_prompt(self):
         self.check_input_tty("prompt\0", b"",
                 expected='ValueError: input: prompt string cannot contain '
                          'null characters')
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_tty_nonencodable_prompt(self):
         self.check_input_tty("prompté", b"quux", "ascii", stdout_errors='strict',
                 expected="UnicodeEncodeError: 'ascii' codec can't encode "
                          "character '\\xe9' in position 6: ordinal not in "
                          "range(128)")
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_tty_nondecodable_input(self):
         self.check_input_tty("prompt", b"quux\xe9", "ascii", stdin_errors='strict',
                 expected="UnicodeDecodeError: 'ascii' codec can't decode "
                          "byte 0xe9 in position 4: ordinal not in "
                          "range(128)")
 
-    @unittest.skip("TODO: RUSTPYTHON; FAILURE, WORKER BUG")
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: got 0 lines in pipe but expected 2, child output was: quux
     def test_input_no_stdout_fileno(self):
         # Issue #24402: If stdin is the original terminal but stdout.fileno()
         # fails, do not use the original stdout file descriptor
@@ -3036,7 +3028,6 @@ class B:
         with self.assertRaises(TypeError):
             type('A', (B,), {'__slots__': '__weakref__'})
 
-    @unittest.skip("TODO: RUSTPYTHON; random failure")
     def test_namespace_order(self):
         # bpo-34320: namespace should preserve order
         od = collections.OrderedDict([('a', 1), ('b', 2)])

diff --git a/Lib/test/test_dataclasses/__init__.py b/Lib/test/test_dataclasses/__init__.py
@@ -5000,7 +5000,6 @@ class Date(Ordered):
         self.assertFalse(inspect.isabstract(Date))
         self.assertGreater(Date(2020,12,25), Date(2020,8,31))
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_maintain_abc(self):
         class A(abc.ABC):
             @abc.abstractmethod

diff --git a/Lib/test/test_float.py b/Lib/test/test_float.py
@@ -255,7 +255,6 @@ def test_keyword_args(self):
         with self.assertRaisesRegex(TypeError, 'keyword argument'):
             float(x='3.14')
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: Unexpected keyword argument newarg
     def test_keywords_in_subclass(self):
         class subclass(float):
             pass

diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
@@ -1238,45 +1238,17 @@ class TestCmpToKeyC(TestCmpToKey, unittest.TestCase):
     if c_functools:
         cmp_to_key = c_functools.cmp_to_key
 
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; inspect.signature reports (args, /) until FromArgs fields generate __text_signature__
+    def test_cmp_to_signature(self):
+        super().test_cmp_to_signature()
+
     @support.cpython_only
     def test_disallow_instantiation(self):
         # Ensure that the type disallows instantiation (bpo-43916)
         support.check_disallow_instantiation(
             self, type(c_functools.cmp_to_key(None))
         )
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; + (mycmp)
-    def test_cmp_to_signature(self):
-        return super().test_cmp_to_signature()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() got multiple values for argument 'mycmp'
-    def test_cmp_to_key_arguments(self):
-        return super().test_cmp_to_key_arguments()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() got multiple values for argument 'mycmp'
-    def test_obj_field(self):
-        return super().test_obj_field()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() takes 1 positional argument but 2 were given
-    def test_bad_cmp(self):
-        return super().test_bad_cmp()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() takes 1 positional argument but 2 were given
-    def test_cmp_to_key(self):
-        return super().test_cmp_to_key()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() takes 1 positional argument but 2 were given
-    def test_hash(self):
-        return super().test_hash()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() takes 1 positional argument but 2 were given
-    def test_sort_int(self):
-        return super().test_sort_int()
-
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; TypeError: cmp_to_key() takes 1 positional argument but 2 were given
-    def test_sort_int_str(self):
-        return super().test_sort_int_str()
-
 
 class TestCmpToKeyPy(TestCmpToKey, unittest.TestCase):
     cmp_to_key = staticmethod(py_functools.cmp_to_key)
@@ -1763,7 +1735,6 @@ def f(x):
         f(0, **{})
         self.assertEqual(f.cache_info().hits, 1)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; Python lru_cache impl doesn't cache hash like C impl
     def test_lru_hash_only_once(self):
         # To protect against weird reentrancy bugs and to improve
         # efficiency when faced with slow __hash__ methods, the
@@ -2266,6 +2237,10 @@ def cached_meth(self, x, y):
     def cached_staticmeth(x, y):
         return 3 * x + y
 
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; Python lru_cache impl doesn't cache hash like C impl
+    def test_lru_hash_only_once(self):
+        return super().test_lru_hash_only_once()
+
 
 @unittest.skipUnless(c_functools, 'requires the C _functools module')
 class TestLRUC(TestLRU, unittest.TestCase):

diff --git a/Lib/test/test_inspect/test_inspect.py b/Lib/test/test_inspect/test_inspect.py
@@ -14,7 +14,7 @@
 import os
 import dis
 from os.path import normcase
-# import _pickle # TODO: RUSTPYTHON
+import _pickle
 import pickle
 import shutil
 import stat
@@ -123,7 +123,6 @@ def istest(self, predicate, exp):
             else:
                 self.assertFalse(other(obj), 'not %s(%s)' % (other.__name__, exp))
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; First has 0, Second has 1:  'iskeyword'
     def test__all__(self):
         support.check__all__(self, inspect, not_exported=("modulesbyfile",), extra=("get_annotations",))
 
@@ -176,7 +175,7 @@ def __get__(self, instance, owner):
 
 class TestPredicates(IsTestBase):
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AttributeError: type object 'defaultdict' has no attribute 'default_factory'
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; datetime.timedelta.days is a property until _datetime members exist
     def test_excluding_predicates(self):
         global tb
         self.istest(inspect.isbuiltin, 'sys.exit')
@@ -480,7 +479,6 @@ class C(object):
         self.assertIn('a', members)
         self.assertNotIn('b', members)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: False is not true
     def test_isabstract(self):
         from abc import ABCMeta, abstractmethod
 
@@ -503,7 +501,6 @@ def foo(self):
         self.assertFalse(inspect.isabstract(int))
         self.assertFalse(inspect.isabstract(5))
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; + [True, False]
     def test_isabstract_during_init_subclass(self):
         from abc import ABCMeta, abstractmethod
         isabstract_checks = []
@@ -1366,7 +1363,7 @@ def test(): pass
         spec = inspect.getfullargspec(test)
         self.assertEqual(test.__annotations__, spec.annotations)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; NameError: name '_pickle' is not defined. Did you mean: 'pickle'? Or did you forget to import '_pickle'?
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; os.stat signature is generated as (path, dir_fd, follow_symlinks, /)
     @unittest.skipIf(MISSING_C_DOCSTRINGS,
                      "Signature information for builtins requires docstrings")
     def test_getfullargspec_builtin_methods(self):
@@ -1531,7 +1528,6 @@ def m1(self): pass
         self.assertIn(('md', 'method', A), attrs, 'missing method descriptor')
         self.assertIn(('dd', 'data', A), attrs, 'missing data descriptor')
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: ('to_bytes', 'method', <class 'int'>) not found in [('__abs__', 'method', <class 'bool'>), ('__add__', 'method', <class 'bool'>), ('__and__', 'method', <class 'bool'>), ('__bool__', 'method', <class 'bool'>), ('__ceil__', 'class method', <class 'int'>), ('__class__', 'data', <class 'object'>), ('__delattr__', 'class method', <class 'object'>), ('__dir__', 'class method', <class 'object'>), ('__divmod__', 'method', <class 'bool'>), ('__doc__', 'data', <class 'bool'>), ('__eq__', 'class method', <class 'int'>), ('__float__', 'method', <class 'bool'>), ('__floor__', 'class method', <class 'int'>), ('__floordiv__', 'method', <class 'bool'>), ('__format__', 'class method', <class 'bool'>), ('__ge__', 'class method', <class 'int'>), ('__getattribute__', 'class method', <class 'object'>), ('__getnewargs__', 'class method', <class 'int'>), ('__getstate__', 'class method', <class 'object'>), ('__gt__', 'class method', <class 'int'>), ('__hash__', 'method', <class 'int'>), ('__index__', 'method', <class 'bool'>), ('__init__', 'method', <class 'object'>), ('__init_subclass__', 'class method', <class 'object'>), ('__int__', 'method', <class 'bool'>), ('__invert__', 'method', <class 'bool'>), ('__le__', 'class method', <class 'int'>), ('__lshift__', 'method', <class 'bool'>), ('__lt__', 'class method', <class 'int'>), ('__mod__', 'method', <class 'bool'>), ('__mul__', 'method', <class 'bool'>), ('__ne__', 'class method', <class 'int'>), ('__neg__', 'method', <class 'bool'>), ('__new__', 'static method', <class 'bool'>), ('__or__', 'method', <class 'bool'>), ('__pos__', 'method', <class 'bool'>), ('__pow__', 'method', <class 'bool'>), ('__radd__', 'method', <class 'bool'>), ('__rand__', 'method', <class 'bool'>), ('__rdivmod__', 'method', <class 'bool'>), ('__reduce__', 'class method', <class 'object'>), ('__reduce_ex__', 'class method', <class 'object'>), ('__repr__', 'method', <class 'bool'>), ('__rfloordiv__', 'method', <class 'bool'>), ('__rlshift__', 'method', <class 'bool'>), ('__rmod__', 'method', <class 'bool'>), ('__rmul__', 'method', <class 'bool'>), ('__ror__', 'method', <class 'bool'>), ('__round__', 'class method', <class 'int'>), ('__rpow__', 'method', <class 'bool'>), ('__rrshift__', 'method', <class 'bool'>), ('__rshift__', 'method', <class 'bool'>), ('__rsub__', 'method', <class 'bool'>), ('__rtruediv__', 'method', <class 'bool'>), ('__rxor__', 'method', <class 'bool'>), ('__setattr__', 'class method', <class 'object'>), ('__sizeof__', 'class method', <class 'int'>), ('__str__', 'method', <class 'object'>), ('__sub__', 'method', <class 'bool'>), ('__subclasshook__', 'class method', <class 'object'>), ('__truediv__', 'method', <class 'bool'>), ('__trunc__', 'class method', <class 'int'>), ('__xor__', 'method', <class 'bool'>), ('as_integer_ratio', 'class method', <class 'int'>), ('bit_count', 'class method', <class 'int'>), ('bit_length', 'class method', <class 'int'>), ('conjugate', 'class method', <class 'int'>), ('denominator', 'data', <class 'int'>), ('from_bytes', 'class method', <class 'int'>), ('imag', 'data', <class 'int'>), ('is_integer', 'class method', <class 'int'>), ('numerator', 'data', <class 'int'>), ('real', 'data', <class 'int'>), ('to_bytes', 'class method', <class 'int'>)] : missing plain method
     def test_classify_builtin_types(self):
         # Simple sanity check that all built-in types can have their
         # attributes classified.
@@ -4210,7 +4206,6 @@ def __init__(self, b):
             self.assertEqual(self.signature(C.__call__, follow_wrapped=False),
                              varargs_signature)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_signature_on_class_with_wrapped_init(self):
         class C:
             @identity_wrapper
@@ -4460,7 +4455,6 @@ def _init(self, x, a):
                             ((('a', ..., ..., "positional_or_keyword"),),
                             ...))
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_signature_on_class_with_new(self):
         with self.subTest('FunctionType'):
             class C:
@@ -4621,7 +4615,7 @@ class D(C): pass
         with self.assertRaisesRegex(ValueError, "callable.*is not supported"):
             self.assertEqual(inspect.signature(D), None)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; NameError: name '_pickle' is not defined. Did you mean: 'pickle'? Or did you forget to import '_pickle'?
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; ValueError: no signature found for builtin type <class '_pickle.Pickler'>
     @unittest.skipIf(MISSING_C_DOCSTRINGS,
                      "Signature information for builtins requires docstrings")
     def test_signature_on_builtin_class(self):
@@ -4647,7 +4641,6 @@ class P4(P2, metaclass=MetaP):
             pass
         self.assertEqual(str(inspect.signature(P4)), '(foo, bar)')
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_signature_on_callable_objects(self):
         class Foo:
             def __call__(self, a):
@@ -5164,7 +5157,7 @@ class foo: pass
         foo_sig = MySignature.from_callable(foo)
         self.assertIsInstance(foo_sig, MySignature)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; NameError: name '_pickle' is not defined. Did you mean: 'pickle'? Or did you forget to import '_pickle'?
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; ValueError: no signature found for builtin type <class '_pickle.Pickler'>
     @unittest.skipIf(MISSING_C_DOCSTRINGS,
                      "Signature information for builtins requires docstrings")
     def test_signature_from_callable_builtin_obj(self):
@@ -6335,7 +6328,6 @@ def func(*args, **kwargs):
         with self.assertRaises(ValueError):
             inspect.signature(func)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: None != '(raw, buffer_size=DEFAULT_BUFFER_SIZE)'
     @support.requires_docstrings
     def test_base_class_have_text_signature(self):
         # see issue 43118
@@ -6567,7 +6559,6 @@ def run_on_interactive_mode(self, source):
             raise ValueError("Process didn't exit properly.")
         return output
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: 'The source is: <<<def f():\n    print(0)\n    return 1 + 2\n>>>' not found in 'Traceback (most recent call last):\n  File "<stdin>", line 1, in <module>\n  File "crates/pylib/Lib/inspect.py", line 1161, in getsource\n    lines, lnum = getsourcelines(object)\n                  ~~~~~~~~~~~~~~^^^^^^^^\n  File "crates/pylib/Lib/inspect.py", line 1143, in getsourcelines\n    lines, lnum = findsource(object)\n                  ~~~~~~~~~~^^^^^^^^\n  File "crates/pylib/Lib/inspect.py", line 978, in findsource\n    raise OSError(\'could not get source code\')\nOSError: could not get source code\n'
     @unittest.skipIf(not has_subprocess_support, "test requires subprocess")
     def test_getsource(self):
         output = self.run_on_interactive_mode(textwrap.dedent("""\

diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
@@ -754,7 +754,6 @@ def keys():
         next(g)
         next(g)  # must pass with address sanitizer
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: 4 != 1
     def test_grouper_reentrant_eq_does_not_crash(self):
         # regression test for gh-146613
         grouper_iter = None
@@ -1167,7 +1166,6 @@ def test_starmap(self):
         self.assertRaises(ValueError, next, starmap(errfunc, [(4,5)]))
         self.assertRaises(TypeError, next, starmap(onearg, [(4,5)]))
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_islice(self):
         for args in [          # islice(args) should agree with range(args)
                 (10, 20, 3),
@@ -2493,7 +2491,6 @@ def __eq__(self, other):
 
 
 class SubclassWithKwargsTest(unittest.TestCase):
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_keywords_in_subclass(self):
         # count is not subclassable...
         testcases = [

diff --git a/Lib/test/test_list.py b/Lib/test/test_list.py
@@ -49,7 +49,6 @@ def test_keyword_args(self):
         with self.assertRaisesRegex(TypeError, 'keyword argument'):
             list(sequence=[])
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_keywords_in_subclass(self):
         class subclass(list):
             pass

diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py
@@ -493,7 +493,6 @@ def test_loads_reject_unicode_strings(self):
         unicode_string = 'T'
         self.assertRaises(TypeError, marshal.loads, unicode_string)
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
     def test_bad_reader(self):
         class BadReader(io.BytesIO):
             def readinto(self, buf):
@@ -510,7 +509,7 @@ def test_eof(self):
         for i in range(len(data)):
             self.assertRaises(EOFError, marshal.loads, data[0: i])
 
-    @unittest.expectedFailure  # TODO: RUSTPYTHON
+    @unittest.expectedFailure  # TODO: RUSTPYTHON; set iteration is insertion order, so PYTHONHASHSEED does not scramble repr
     def test_deterministic_sets(self):
         # bpo-37596: To support reproducible builds, sets and frozensets need to
         # have their elements serialized in a consistent order (even when they