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bpo-43901: Lazy-create an empty annotations dict in all unannotated user classes and modules (#25623)

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Change class and module objects to lazy-create empty annotations dicts on demand.  The annotations dicts are stored in the object's `__dict__` for backwards compatibility.
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larryhastings 2021-04-29 20:09:08 -07:00 • committed by GitHub
parent dbe60ee09d
commit 2f2b69855d
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9 changed files with 308 additions and 8 deletions
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5
Lib/test/test_opcodes.py
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@ -31,10 +31,9 @@ class OpcodeTest(unittest.TestCase):
except OSError:
pass
def test_no_annotations_if_not_needed(self):
def test_default_annotations_exist(self):
class C: pass
with self.assertRaises(AttributeError):
C.__annotations__
self.assertEqual(C.__annotations__, {})
def test_use_existing_annotations(self):
ns = {'__annotations__': {1: 2}}