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Issue #28556: Allow keyword syntax for NamedTuple (Ivan Levkivskyi) (upstream #321)

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This commit is contained in:
Guido van Rossum 2016-11-15 09:48:06 -08:00
parent 49e8f2d204
commit 2f84144235
2 changed files with 52 additions and 36 deletions
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14
Lib/test/test_typing.py
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@ -1865,6 +1865,20 @@ class NamedTupleTests(BaseTestCase):
self.assertEqual(CoolEmployee._fields, ('name', 'cool'))
self.assertEqual(CoolEmployee._field_types, dict(name=str, cool=int))
@skipUnless(PY36, 'Python 3.6 required')
def test_namedtuple_keyword_usage(self):
LocalEmployee = NamedTuple("LocalEmployee", name=str, age=int)
nick = LocalEmployee('Nick', 25)
self.assertIsInstance(nick, tuple)
self.assertEqual(nick.name, 'Nick')
self.assertEqual(LocalEmployee.__name__, 'LocalEmployee')
self.assertEqual(LocalEmployee._fields, ('name', 'age'))
self.assertEqual(LocalEmployee._field_types, dict(name=str, age=int))
with self.assertRaises(TypeError):
NamedTuple('Name', [('x', int)], y=str)
with self.assertRaises(TypeError):
NamedTuple('Name', x=1, y='a')
def test_pickle(self):
global Emp # pickle wants to reference the class by name
Emp = NamedTuple('Emp', [('name', str), ('id', int)])