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bpo-43908: Make re types immutable (GH-25697)

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Co-authored-by: Victor Stinner <vstinner@python.org>
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Erlend Egeberg Aasland 2021-04-29 08:47:11 +02:00 • committed by GitHub
parent 1e7b858575
commit 5daf70b22e
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3 changed files with 17 additions and 3 deletions
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12
Lib/test/test_re.py
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@ -2190,6 +2190,18 @@ class ImplementationTest(unittest.TestCase):
Test implementation details of the re module.
"""
@cpython_only
def test_immutable(self):
# bpo-43908: check that re types are immutable
with self.assertRaises(TypeError):
re.Match.foo = 1
with self.assertRaises(TypeError):
re.Pattern.foo = 1
with self.assertRaises(TypeError):
pat = re.compile("")
tp = type(pat.scanner(""))
tp.foo = 1
def test_overlap_table(self):
f = sre_compile._generate_overlap_table
self.assertEqual(f(""), [])