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bpo-43510: PEP 597: Accept encoding="locale" in binary mode (GH-25103)

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It make `encoding="locale"` usable everywhere `encoding=None` is
allowed.
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Inada Naoki 2021-03-31 14:26:08 +09:00 • committed by GitHub
parent 1b4a9c7956
commit ff3c9739bd
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3 changed files with 14 additions and 2 deletions
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11
Lib/test/test_io.py
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@ -531,6 +531,17 @@ class IOTest(unittest.TestCase):
self.assertRaises(OSError, obj.truncate)
self.assertRaises(OSError, obj.truncate, 0)
def test_open_binmode_encoding(self):
"""open() raises ValueError when encoding is specified in bin mode"""
self.assertRaises(ValueError, self.open, os_helper.TESTFN,
"wb", encoding="utf-8")
# encoding=None and encoding="locale" is allowed.
with self.open(os_helper.TESTFN, "wb", encoding=None):
pass
with self.open(os_helper.TESTFN, "wb", encoding="locale"):
pass
def test_open_handles_NUL_chars(self):
fn_with_NUL = 'foo\0bar'
self.assertRaises(ValueError, self.open, fn_with_NUL, 'w')