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GH-128520: pathlib ABCs: validate magic_open() arguments (#131617)

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When `pathlib._os.magic_open()` is called to open a path in binary mode,
raise `ValueError` if any of the *encoding*, *errors* or *newline*
arguments are given. This matches the `open()` built-in.
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Barney Gale 2025-03-24 15:13:18 +00:00 • committed by GitHub
parent fbfb0e1f6e
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Lib/test/test_pathlib/test_write.py
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@ -41,6 +41,9 @@ class WriteTestBase:
#self.assertIsInstance(f, io.BufferedWriter)
f.write(b'this is file A\n')
self.assertEqual(self.ground.readbytes(p), b'this is file A\n')
self.assertRaises(ValueError, magic_open, p, 'wb', encoding='utf8')
self.assertRaises(ValueError, magic_open, p, 'wb', errors='strict')
self.assertRaises(ValueError, magic_open, p, 'wb', newline='')
def test_write_bytes(self):
p = self.root / 'fileA'