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gh-53203: Fix strptime() for %c, %x and %X formats on many locales (GH-125406)
Fixed most locales that use non-ASCII digits, like Persian, Burmese, Odia and Shan.
This commit is contained in:
Serhiy Storchaka
GitHub
parent
06ca33020e
commit
5f4e5b598c
@ -15,6 +15,7 @@ import time
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import locale
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import calendar
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from re import compile as re_compile
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from re import sub as re_sub
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from re import IGNORECASE
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from re import escape as re_escape
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from datetime import (date as datetime_date,
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@ -129,11 +130,23 @@ class LocaleTime(object):
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time_tuple = time.struct_time((1999,3,17,22,44,55,2,76,0))
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time_tuple2 = time.struct_time((1999,1,3,1,1,1,6,3,0))
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replacement_pairs = [
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('1999', '%Y'), ('99', '%y'), ('22', '%H'),
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('44', '%M'), ('55', '%S'), ('76', '%j'),
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('17', '%d'), ('03', '%m'), ('3', '%m'),
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# '3' needed for when no leading zero.
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('2', '%w'), ('10', '%I')]
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('1999', '%Y'), ('99', '%y'), ('22', '%H'),
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('44', '%M'), ('55', '%S'), ('76', '%j'),
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('17', '%d'), ('03', '%m'), ('3', '%m'),
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# '3' needed for when no leading zero.
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('2', '%w'), ('10', '%I'),
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# Non-ASCII digits
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('\u0661\u0669\u0669\u0669', '%Y'),
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('\u0669\u0669', '%Oy'),
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('\u0662\u0662', '%OH'),
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('\u0664\u0664', '%OM'),
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('\u0665\u0665', '%OS'),
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('\u0661\u0667', '%Od'),
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('\u0660\u0663', '%Om'),
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('\u0663', '%Om'),
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('\u0662', '%Ow'),
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('\u0661\u0660', '%OI'),
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]
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date_time = []
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for directive in ('%c', '%x', '%X'):
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current_format = time.strftime(directive, time_tuple).lower()
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@ -158,6 +171,10 @@ class LocaleTime(object):
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for tz in tz_values:
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if tz:
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current_format = current_format.replace(tz, "%Z")
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# Transform all non-ASCII digits to digits in range U+0660 to U+0669.
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current_format = re_sub(r'\d(?<![0-9])',
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lambda m: chr(0x0660 + int(m[0])),
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current_format)
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for old, new in replacement_pairs:
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current_format = current_format.replace(old, new)
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# If %W is used, then Sunday, 2005-01-03 will fall on week 0 since
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@ -267,7 +284,7 @@ class TimeRE(dict):
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else:
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self.locale_time = LocaleTime()
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base = super()
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base.__init__({
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mapping = {
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# The " [1-9]" part of the regex is to make %c from ANSI C work
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'd': r"(?P<d>3[0-1]|[1-2]\d|0[1-9]|[1-9]| [1-9])",
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'f': r"(?P<f>[0-9]{1,6})",
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@ -296,11 +313,15 @@ class TimeRE(dict):
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'Z': self.__seqToRE((tz for tz_names in self.locale_time.timezone
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for tz in tz_names),
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'Z'),
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'%': '%'})
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base.__setitem__('W', base.__getitem__('U').replace('U', 'W'))
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base.__setitem__('c', self.pattern(self.locale_time.LC_date_time))
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base.__setitem__('x', self.pattern(self.locale_time.LC_date))
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'%': '%'}
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for d in 'dmyHIMS':
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mapping['O' + d] = r'(?P<%s>\d\d|\d| \d)' % d
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mapping['Ow'] = r'(?P<w>\d)'
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mapping['W'] = mapping['U'].replace('U', 'W')
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base.__init__(mapping)
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base.__setitem__('X', self.pattern(self.locale_time.LC_time))
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base.__setitem__('x', self.pattern(self.locale_time.LC_date))
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base.__setitem__('c', self.pattern(self.locale_time.LC_date_time))
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def __seqToRE(self, to_convert, directive):
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"""Convert a list to a regex string for matching a directive.
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@ -328,28 +349,25 @@ class TimeRE(dict):
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regex syntax are escaped.
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"""
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processed_format = ''
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# The sub() call escapes all characters that might be misconstrued
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# as regex syntax. Cannot use re.escape since we have to deal with
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# format directives (%m, etc.).
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regex_chars = re_compile(r"([\\.^$*+?\(\){}\[\]|])")
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format = regex_chars.sub(r"\\\1", format)
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whitespace_replacement = re_compile(r'\s+')
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format = whitespace_replacement.sub(r'\\s+', format)
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format = re_sub(r"([\\.^$*+?\(\){}\[\]|])", r"\\\1", format)
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format = re_sub(r'\s+', r'\\s+', format)
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format = re_sub(r"'", "['\u02bc]", format) # needed for br_FR
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year_in_format = False
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day_of_month_in_format = False
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while '%' in format:
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directive_index = format.index('%')+1
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format_char = format[directive_index]
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processed_format = "%s%s%s" % (processed_format,
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format[:directive_index-1],
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self[format_char])
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format = format[directive_index+1:]
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def repl(m):
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format_char = m[1]
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match format_char:
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case 'Y' | 'y' | 'G':
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nonlocal year_in_format
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year_in_format = True
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case 'd':
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nonlocal day_of_month_in_format
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day_of_month_in_format = True
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return self[format_char]
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format = re_sub(r'%(O?.)', repl, format)
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if day_of_month_in_format and not year_in_format:
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import warnings
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warnings.warn("""\
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@ -360,7 +378,7 @@ To avoid trouble, add a specific year to the input & format.
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See https://github.com/python/cpython/issues/70647.""",
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DeprecationWarning,
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skip_file_prefixes=(os.path.dirname(__file__),))
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return "%s%s" % (processed_format, format)
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return format
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def compile(self, format):
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"""Return a compiled re object for the format string."""
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@ -434,8 +452,8 @@ def _strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
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_regex_cache[format] = format_regex
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found = format_regex.match(data_string)
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if not found:
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raise ValueError("time data %r does not match format %r :: /%s/" %
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(data_string, format, format_regex.pattern))
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raise ValueError("time data %r does not match format %r" %
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(data_string, format))
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if len(data_string) != found.end():
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raise ValueError("unconverted data remains: %s" %
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data_string[found.end():])
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@ -292,7 +292,7 @@ class StrptimeTests(unittest.TestCase):
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# additional check for IndexError branch (issue #19545)
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with self.assertRaises(ValueError) as e:
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_strptime._strptime_time('19', '%Y %')
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self.assertIs(e.exception.__suppress_context__, True)
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self.assertIsNone(e.exception.__context__)
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def test_unconverteddata(self):
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# Check ValueError is raised when there is unconverted data
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@ -485,12 +485,14 @@ class StrptimeTests(unittest.TestCase):
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# id_ID, ms_MY.
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# * Year is not included: ha_NG.
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# * Use non-Gregorian calendar: lo_LA, thai, th_TH.
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# On Windows: ar_IN, ar_SA, fa_IR, ps_AF.
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#
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# BUG: Generates regexp that does not match the current date and time
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# for az_IR, fa_IR, lzh_TW, my_MM, or_IN, shn_MM.
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# for lzh_TW.
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@run_with_locales('LC_TIME', 'C', 'en_US', 'fr_FR', 'de_DE', 'ja_JP',
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'he_IL', 'eu_ES', 'ar_AE', 'mfe_MU', 'yo_NG',
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'csb_PL', 'br_FR', 'gez_ET', 'brx_IN')
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'csb_PL', 'br_FR', 'gez_ET', 'brx_IN',
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'my_MM', 'or_IN', 'shn_MM', 'az_IR')
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def test_date_time_locale(self):
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# Test %c directive
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loc = locale.getlocale(locale.LC_TIME)[0]
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@ -512,20 +514,23 @@ class StrptimeTests(unittest.TestCase):
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self.roundtrip('%c', slice(0, 6), time.localtime(now - 366*24*3600))
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# NB: Dates before 1969 do not roundtrip on some locales:
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# bo_CN, bo_IN, dz_BT, eu_ES, eu_FR.
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# az_IR, bo_CN, bo_IN, dz_BT, eu_ES, eu_FR, fa_IR, or_IN.
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@run_with_locales('LC_TIME', 'C', 'en_US', 'fr_FR', 'de_DE', 'ja_JP',
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'he_IL', 'ar_AE', 'mfe_MU', 'yo_NG',
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'csb_PL', 'br_FR', 'gez_ET', 'brx_IN')
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'csb_PL', 'br_FR', 'gez_ET', 'brx_IN',
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'my_MM', 'shn_MM')
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def test_date_time_locale2(self):
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# Test %c directive
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self.roundtrip('%c', slice(0, 6), (1900, 1, 1, 0, 0, 0, 0, 1, 0))
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self.roundtrip('%c', slice(0, 6), (1800, 1, 1, 0, 0, 0, 0, 1, 0))
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# NB: Does not roundtrip because use non-Gregorian calendar:
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# lo_LA, thai, th_TH.
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# lo_LA, thai, th_TH. On Windows: ar_IN, ar_SA, fa_IR, ps_AF.
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# BUG: Generates regexp that does not match the current date
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# for az_IR, fa_IR, lzh_TW, my_MM, or_IN, shn_MM.
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# for lzh_TW.
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@run_with_locales('LC_TIME', 'C', 'en_US', 'fr_FR', 'de_DE', 'ja_JP',
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'he_IL', 'eu_ES', 'ar_AE')
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'he_IL', 'eu_ES', 'ar_AE',
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'az_IR', 'my_MM', 'or_IN', 'shn_MM')
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def test_date_locale(self):
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# Test %x directive
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now = time.time()
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@ -545,10 +550,11 @@ class StrptimeTests(unittest.TestCase):
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"musl libc issue on Emscripten, bpo-46390"
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)
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@run_with_locales('LC_TIME', 'en_US', 'fr_FR', 'de_DE', 'ja_JP',
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'eu_ES', 'ar_AE')
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'eu_ES', 'ar_AE', 'my_MM', 'shn_MM')
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def test_date_locale2(self):
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# Test %x directive
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self.roundtrip('%x', slice(0, 3), (1900, 1, 1, 0, 0, 0, 0, 1, 0))
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self.roundtrip('%x', slice(0, 3), (1800, 1, 1, 0, 0, 0, 0, 1, 0))
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# NB: Does not roundtrip in some locales due to the ambiguity of
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# the time representation (bugs in locales?):
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@ -556,11 +562,11 @@ class StrptimeTests(unittest.TestCase):
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# norwegian, nynorsk.
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# * Hours are in 12-hour notation without AM/PM indication: hy_AM,
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# ms_MY, sm_WS.
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# BUG: Generates regexp that does not match the current time for
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# aa_DJ, aa_ER, aa_ET, am_ET, az_IR, byn_ER, fa_IR, gez_ER, gez_ET,
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# lzh_TW, my_MM, om_ET, om_KE, or_IN, shn_MM, sid_ET, so_DJ, so_ET,
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# so_SO, ti_ER, ti_ET, tig_ER, wal_ET.
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@run_with_locales('LC_TIME', 'C', 'en_US', 'fr_FR', 'de_DE', 'ja_JP')
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# BUG: Generates regexp that does not match the current time for lzh_TW.
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@run_with_locales('LC_TIME', 'C', 'en_US', 'fr_FR', 'de_DE', 'ja_JP',
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'aa_ET', 'am_ET', 'az_IR', 'byn_ER', 'fa_IR', 'gez_ET',
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'my_MM', 'om_ET', 'or_IN', 'shn_MM', 'sid_ET', 'so_SO',
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'ti_ET', 'tig_ER', 'wal_ET')
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def test_time_locale(self):
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# Test %X directive
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now = time.time()
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@ -298,7 +298,7 @@ class TimeTestCase(unittest.TestCase):
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# additional check for IndexError branch (issue #19545)
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with self.assertRaises(ValueError) as e:
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time.strptime('19', '%Y %')
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self.assertIs(e.exception.__suppress_context__, True)
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self.assertIsNone(e.exception.__context__)
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def test_strptime_leap_year(self):
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# GH-70647: warns if parsing a format with a day and no year.
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@ -0,0 +1,2 @@
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Fix :func:`time.strptime` for ``%c``, ``%x`` and ``%X`` formats in many
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locales that use non-ASCII digits, like Persian, Burmese, Odia and Shan.
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