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gh-94949: Disallow parsing parenthesised ctx mgr with old feature_version (GH-94950)

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* gh-94949: Disallow parsing parenthesised ctx manager with old feature_version

* 📜🤖 Added by blurb_it.

* Allow it with feature_version=(3, 9) as well

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
(cherry picked from commit 0daba82221)

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
This commit is contained in:
Miss Islington (bot) 2022-07-18 14:57:45 -07:00 • committed by GitHub
parent be84daf52a
commit 7733aa048e
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4 changed files with 11 additions and 2 deletions
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8
Lib/test/test_ast.py
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@ -738,6 +738,14 @@ class AST_Tests(unittest.TestCase):
expressions[0] = f"expr = {ast.expr.__subclasses__()[0].__doc__}"
self.assertCountEqual(ast.expr.__doc__.split("\n"), expressions)
def test_parenthesized_with_feature_version(self):
ast.parse('with (CtxManager() as example): ...', feature_version=(3, 10))
# While advertised as a feature in Python 3.10, this was allowed starting 3.9
ast.parse('with (CtxManager() as example): ...', feature_version=(3, 9))
with self.assertRaises(SyntaxError):
ast.parse('with (CtxManager() as example): ...', feature_version=(3, 8))
ast.parse('with CtxManager() as example: ...', feature_version=(3, 8))
def test_issue40614_feature_version(self):
ast.parse('f"{x=}"', feature_version=(3, 8))
with self.assertRaises(SyntaxError):