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

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Merged
vstinner 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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encodings.normalize_encoding() should ignore non-ASCII letters
shihai1991 Sep 12, 2020
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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
shihai1991 committed Oct 10, 2020
commit 2e73d13ef9e7999ac7fe575c5eb380f41d59cb37
13 changes: 6 additions & 7 deletions Lib/test/test_codecs.py
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Expand Up @@ -3442,19 +3442,18 @@ def search_function(encoding):

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

def test_normalization(self):
# encodings.normalize_encoding() ignores non-ASCII letters.
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')
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out = encodings.normalize_encoding('utf 8')
self.assertEqual(out, 'utf_8')
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out = encodings.normalize_encoding('UTF 8')
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@vstinner vstinner Oct 11, 2020

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Would you mind to add a comment to explain that the function does not convert upper case letters to lower case letters, just to make the purpose of this test even more explicit?

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@shihai1991 shihai1991 Oct 12, 2020 •
edited
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To be honest, I don't know how to exact explain it~
I found a case in https://github.com/python/cpython/blob/master/Lib/locale.py#L358.
Looks like It's fine to update encodings.normalize_encoding() to conver to lower-case.

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@shihai1991 shihai1991 Oct 12, 2020

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just describe the fact, Lol~

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@shihai1991 shihai1991 Oct 12, 2020

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Maybe we can enhance this encodings.normalize_encoding()? I am not sure~

self.assertEqual(out, 'UTF_8')
out = encodings.normalize_encoding('utf...8')
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self.assertEqual(out, 'utf...8')


if __name__ == "__main__":
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