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bpo-42059: Fix required/optional keys for TypedDict(..., total=False) (GH-22736)

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Alex Grönholm 2020-12-10 23:49:05 +02:00 committed by GitHub
parent a658287179
commit 67b769f515
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 7 additions and 2 deletions
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4
Lib/test/test_typing.py
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@ -3895,10 +3895,14 @@ class TypedDictTests(BaseTestCase):
self.assertEqual(D(), {})
self.assertEqual(D(x=1), {'x': 1})
self.assertEqual(D.__total__, False)
self.assertEqual(D.__required_keys__, frozenset())
self.assertEqual(D.__optional_keys__, {'x'})
self.assertEqual(Options(), {})
self.assertEqual(Options(log_level=2), {'log_level': 2})
self.assertEqual(Options.__total__, False)
self.assertEqual(Options.__required_keys__, frozenset())
self.assertEqual(Options.__optional_keys__, {'log_level', 'log_path'})
def test_optional_keys(self):
class Point2Dor3D(Point2D, total=False):

4
Lib/typing.py
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@ -2043,14 +2043,14 @@ def TypedDict(typename, fields=None, /, *, total=True, **kwargs):
raise TypeError("TypedDict takes either a dict or keyword arguments,"
" but not both")
ns = {'__annotations__': dict(fields), '__total__': total}
ns = {'__annotations__': dict(fields)}
try:
# Setting correct module is necessary to make typed dict classes pickleable.
ns['__module__'] = sys._getframe(1).f_globals.get('__name__', '__main__')
except (AttributeError, ValueError):
pass
return _TypedDictMeta(typename, (), ns)
return _TypedDictMeta(typename, (), ns, total=total)
_TypedDict = type.__new__(_TypedDictMeta, 'TypedDict', (), {})
TypedDict.__mro_entries__ = lambda bases: (_TypedDict,)

1
Misc/NEWS.d/next/Library/2020-10-17-12-42-08.bpo-42059.ZGMZ3D.rst Normal file
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@ -0,0 +1 @@
:class:`typing.TypedDict` types created using the alternative call-style syntax now correctly respect the ``total`` keyword argument when setting their ``__required_keys__`` and ``__optional_keys__`` class attributes.