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bpo-46998: Allow subclassing Any at runtime #31841

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Merged
JelleZijlstra merged 15 commits into from
Apr 5, 2022
Merged

bpo-46998: Allow subclassing Any at runtime #31841

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bc71456
bpo-46998: Allow subclassing Any at runtime
Mar 13, 2022
abea39a
make error consistent
Mar 13, 2022
771f492
remove functools checks
Mar 13, 2022
900f2c7
📜🤖 Added by blurb_it.
blurb-it[bot] Mar 13, 2022
6e76441
more tests
Mar 13, 2022
b00ab17
Update Misc/NEWS.d/next/Library/2022-03-13-08-52-58.bpo-46998.cHh-9O.rst
hauntsaninja Mar 13, 2022
4d913ad
oops, fix test
Mar 13, 2022
1c1ab38
cooperative inheritance
Mar 13, 2022
4927e78
fix tests
Mar 13, 2022
68ea3a8
okay, make instancecheck work with multiple inheritance
Mar 13, 2022
f94b7e0
mention in docs
Mar 30, 2022
05db029
Merge remote-tracking branch 'upstream/main' into subclass-any
Mar 30, 2022
e11f405
fix pydoc test
Mar 30, 2022
63b00e4
add a sentence on reasoning
Mar 30, 2022
ac7b4a8
preposition
Mar 31, 2022
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more tests
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hauntsaninja
hauntsaninja committed Mar 13, 2022
commit 6e7644165f71c20d0f2ebd38354ec8298d840214
15 changes: 13 additions & 2 deletions Lib/test/test_typing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -99,8 +99,19 @@ def test_errors(self):
Any[int] # Any is not a generic type.

def test_can_subclass(self):
class X(Any): pass
X()
class Mock(Any): pass
self.assertTrue(issubclass(Mock, Any))
self.assertIsInstance(Mock(), Mock)

class Something: pass
self.assertFalse(issubclass(Something, Any))
self.assertNotIsInstance(Something(), Any)

class MockSomething(Something, Any): pass
self.assertTrue(issubclass(MockSomething, Any))
ms = MockSomething()
self.assertIsInstance(ms, Mock)
self.assertIsInstance(ms, Something)

def test_cannot_instantiate(self):
with self.assertRaises(TypeError):
Expand Down