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bpo-39674: Revert "bpo-37330: open() no longer accept 'U' in file mode (GH-16959)" (GH-18767)

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This reverts commit e471e72977.

The mode will be removed from Python 3.10.
This commit is contained in:
Victor Stinner 2020-03-04 18:50:22 +01:00 • committed by GitHub
parent 00c77ae55a
commit 942f7a2dea
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GPG key ID: 4AEE18F83AFDEB23
13 changed files with 99 additions and 54 deletions
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18
Lib/test/test_codecs.py
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@ -712,23 +712,11 @@ class UTF16Test(ReadTest, unittest.TestCase):
self.addCleanup(support.unlink, support.TESTFN)
with open(support.TESTFN, 'wb') as fp:
fp.write(s)
with codecs.open(support.TESTFN, 'r',
encoding=self.encoding) as reader:
with support.check_warnings(('', DeprecationWarning)):
reader = codecs.open(support.TESTFN, 'U', encoding=self.encoding)
with reader:
self.assertEqual(reader.read(), s1)
def test_invalid_modes(self):
for mode in ('U', 'rU', 'r+U'):
with self.assertRaises(ValueError) as cm:
codecs.open(support.TESTFN, mode, encoding=self.encoding)
self.assertIn('invalid mode', str(cm.exception))
for mode in ('rt', 'wt', 'at', 'r+t'):
with self.assertRaises(ValueError) as cm:
codecs.open(support.TESTFN, mode, encoding=self.encoding)
self.assertIn("can't have text and binary mode at once",
str(cm.exception))
class UTF16LETest(ReadTest, unittest.TestCase):
encoding = "utf-16-le"
ill_formed_sequence = b"\x80\xdc"