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bpo-39337: encodings.normalize_encoding() now ignores non-ASCII characters #22219

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Merged
merged 12 commits into from
Oct 14, 2020
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bpo-39337: encodings.normalize_encoding() now ignores non-ASCII characters #22219

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8ae6408
encodings.normalize_encoding() should ignore non-ASCII letters
shihai1991 Sep 12, 2020
0fcafb8
update test
shihai1991 Sep 12, 2020
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Revert "update test"
shihai1991 Sep 12, 2020
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shihai1991 Oct 3, 2020
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shihai1991 Oct 9, 2020
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Merge remote-tracking branch 'origin/master' into bpo_39337_new_2
shihai1991 Oct 9, 2020
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shihai1991 Oct 10, 2020
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shihai1991 Oct 12, 2020
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shihai1991 Oct 12, 2020
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shihai1991 Oct 13, 2020
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shihai1991 Oct 13, 2020
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3 changes: 2 additions & 1 deletion Lib/encodings/__init__.py
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Expand Up @@ -61,7 +61,8 @@ def normalize_encoding(encoding):
if c.isalnum() or c == '.':
if punct and chars:
chars.append('_')
chars.append(c)
if c.isascii():
chars.append(c)
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I wanted to ask you to add a ".. versionchanged:: 3.10" entry in the documentation, but then I noticed that the encodings module was never documented! Oh!

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If end user will use this function or module, I can try to create the doc, but I need some time to do it :)

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It can and must be addressed in a separated PR anymore. The lack of documentation should not hold this change.

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ok, copy that.

punct = False
else:
punct = True
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17 changes: 17 additions & 0 deletions Lib/test/test_codecs.py
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Expand Up @@ -3440,5 +3440,22 @@ def search_function(encoding):
self.assertEqual(NOT_FOUND, codecs.lookup('a\xe9\u20ac-8'))


class EncodingNormalizationTest(unittest.TestCase):

def test_bpo39337(self):
"""
bpo-39337: similar to _Py_normalize_encoding(),
encodings.normalize_encoding() should ignore non-ASCII letters.
"""
import encodings

out = encodings.normalize_encoding('utf\xE9\u20AC\U0010ffff-8')
self.assertEqual(out, 'utf_8')
out = encodings.normalize_encoding('utf_8')
self.assertEqual(out, 'utf_8')
out = encodings.normalize_encoding('utf 8')
self.assertEqual(out, 'utf_8')


if __name__ == "__main__":
unittest.main()
1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2020-09-13-02-02-18.bpo-39337.L3NXTt.rst
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@@ -0,0 +1 @@
:func:`encodings.normalize_encoding` now ignores non-ASCII letters.