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bpo-31677: email: Remove re.IGNORECASE flag (GH-3868)

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While there is not real bug in this case, using re.IGNORECASE without re.ASCII
leads unexpected behavior.
Instead of adding re.ASCII, this commit removes re.IGNORECASE flag because
it's easier and simpler.

This commit removes dead copy of the pattern in email.util module too.
While the pattern is same, it is compiled separately because it had different flags.
This commit is contained in:
INADA Naoki 2017-10-04 12:47:38 +09:00 • committed by GitHub
parent e2d0dd2cf9
commit bf477a99e0
2 changed files with 2 additions and 14 deletions
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12
Lib/email/utils.py
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@ -114,18 +114,6 @@ def getaddresses(fieldvalues):
return a.addresslist
ecre = re.compile(r'''
=\? # literal =?
(?P<charset>[^?]*?) # non-greedy up to the next ? is the charset
\? # literal ?
(?P<encoding>[qb]) # either a "q" or a "b", case insensitive
\? # literal ?
(?P<atom>.*?) # non-greedy up to the next ?= is the atom
\?= # literal ?=
''', re.VERBOSE | re.IGNORECASE)
def _format_timetuple_and_zone(timetuple, zone):
return '%s, %02d %s %04d %02d:%02d:%02d %s' % (
['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'][timetuple[6]],