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[3.7] bpo-29571: Fix test_re.test_locale_flag() by vstinner · Pull Request #12178 · python/cpython · GitHub

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[3.7] bpo-29571: Fix test_re.test_locale_flag() #12178

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Merged
vstinner merged 2 commits into from
Mar 5, 2019
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[3.7] bpo-29571: Fix test_re.test_locale_flag() #12178

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bpo-29571: Fix test_re.test_locale_flag()
vstinner Mar 5, 2019
6368e30
Add NEWS entry
vstinner Mar 5, 2019
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14 changes: 12 additions & 2 deletions Lib/test/test_re.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1516,8 +1516,18 @@ def test_ascii_and_unicode_flag(self):
self.assertRaises(re.error, re.compile, r'(?au)\w')

def test_locale_flag(self):
import locale
_, enc = locale.getlocale(locale.LC_CTYPE)
# On Windows, Python 3.7 doesn't call setlocale(LC_CTYPE, "") at
# startup and so the LC_CTYPE locale uses Latin1 encoding by default,
# whereas getpreferredencoding() returns the ANSI code page. Set
# temporarily the LC_CTYPE locale to the user preferred encoding to
# ensure that it uses the ANSI code page.
oldloc = locale.setlocale(locale.LC_CTYPE, None)
locale.setlocale(locale.LC_CTYPE, "")
self.addCleanup(locale.setlocale, locale.LC_CTYPE, oldloc)

# Get the current locale encoding
enc = locale.getpreferredencoding(False)

# Search non-ASCII letter
for i in range(128, 256):
try:
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6 changes: 6 additions & 0 deletions Misc/NEWS.d/next/Tests/2019-03-05-13-48-39.bpo-29571.ecGuKR.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
Fix ``test_re.test_locale_flag()``: use ``locale.getpreferredencoding()``
rather than ``locale.getlocale()`` to get the locale encoding. With some
locales, ``locale.getlocale()`` returns the wrong encoding. On Windows, set
temporarily the ``LC_CTYPE`` locale to the user preferred encoding to ensure
that it uses the ANSI code page, to be consistent with
``locale.getpreferredencoding()``.
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