Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 34bfde919e104e34eaa4135867aa2947510623b7 authored by Kurt B. Kaiser on 24 November 2003, 02:34:01 UTC, committed by Kurt B. Kaiser on 24 November 2003, 02:34:01 UTC
- After an exception, run.py was not setting the exception vector. Noam Raphael suggested correcting this so pdb's postmortem pm() would work. IDLEfork Patch 844675 Update NEWS and include some items missed in IDLE1.0b2. Bump the version. Modified Files: Tag: release23-maint NEWS.txt idlever.py run.py
1 parent c9de825
Tip revision: 34bfde919e104e34eaa4135867aa2947510623b7 authored by Kurt B. Kaiser on 24 November 2003, 02:34:01 UTC
Backport:
Backport:
Tip revision: 34bfde9
_strptime.py
"""Strptime-related classes and functions.
CLASSES:
LocaleTime -- Discovers and/or stores locale-specific time information
TimeRE -- Creates regexes for pattern matching a string of text containing
time information as is returned by time.strftime()
FUNCTIONS:
_getlang -- Figure out what language is being used for the locale
strptime -- Calculates the time struct represented by the passed-in string
Requires Python 2.2.1 or higher (mainly because of the use of property()).
Can be used in Python 2.2 if the following line is added:
True = 1; False = 0
"""
import time
import locale
import calendar
from re import compile as re_compile
from re import IGNORECASE
from datetime import date as datetime_date
__author__ = "Brett Cannon"
__email__ = "brett@python.org"
__all__ = ['strptime']
def _getlang():
# Figure out what the current language is set to.
return locale.getlocale(locale.LC_TIME)
class LocaleTime(object):
"""Stores and handles locale-specific information related to time.
This is not thread-safe! Attributes are lazily calculated and no
precaution is taken to check to see if the locale information has changed
since the creation of the instance in use.
ATTRIBUTES (all read-only after instance creation! Instance variables that
store the values have mangled names):
f_weekday -- full weekday names (7-item list)
a_weekday -- abbreviated weekday names (7-item list)
f_month -- full month names (13-item list; dummy value in [0], which
is added by code)
a_month -- abbreviated month names (13-item list, dummy value in
[0], which is added by code)
am_pm -- AM/PM representation (2-item list)
LC_date_time -- format string for date/time representation (string)
LC_date -- format string for date representation (string)
LC_time -- format string for time representation (string)
timezone -- daylight- and non-daylight-savings timezone representation
(3-item list; code tacks on blank item at end for
possible lack of timezone such as UTC)
lang -- Language used by instance (string)
"""
def __init__(self, f_weekday=None, a_weekday=None, f_month=None,
a_month=None, am_pm=None, LC_date_time=None, LC_time=None,
LC_date=None, timezone=None, lang=None):
"""Optionally set attributes with passed-in values."""
if f_weekday is None:
self.__f_weekday = None
elif len(f_weekday) == 7:
self.__f_weekday = list(f_weekday)
else:
raise TypeError("full weekday names must be a 7-item sequence")
if a_weekday is None:
self.__a_weekday = None
elif len(a_weekday) == 7:
self.__a_weekday = list(a_weekday)
else:
raise TypeError(
"abbreviated weekday names must be a 7-item sequence")
if f_month is None:
self.__f_month = None
elif len(f_month) == 12:
self.__f_month = self.__pad(f_month, True)
else:
raise TypeError("full month names must be a 12-item sequence")
if a_month is None:
self.__a_month = None
elif len(a_month) == 12:
self.__a_month = self.__pad(a_month, True)
else:
raise TypeError(
"abbreviated month names must be a 12-item sequence")
if am_pm is None:
self.__am_pm = None
elif len(am_pm) == 2:
self.__am_pm = am_pm
else:
raise TypeError("AM/PM representation must be a 2-item sequence")
self.__LC_date_time = LC_date_time
self.__LC_time = LC_time
self.__LC_date = LC_date
self.__timezone = timezone
if timezone:
if len(timezone) != 2:
raise TypeError("timezone names must contain 2 items")
else:
self.__timezone = self.__pad(timezone, False)
if lang:
self.__lang = lang
else:
self.__lang = _getlang()
def __pad(self, seq, front):
# Add '' to seq to either front (is True), else the back.
seq = list(seq)
if front:
seq.insert(0, '')
else:
seq.append('')
return seq
def __set_nothing(self, stuff):
# Raise TypeError when trying to set an attribute.
raise TypeError("attribute does not support assignment")
def __get_f_weekday(self):
# Fetch self.f_weekday.
if not self.__f_weekday:
self.__calc_weekday()
return self.__f_weekday
def __get_a_weekday(self):
# Fetch self.a_weekday.
if not self.__a_weekday:
self.__calc_weekday()
return self.__a_weekday
f_weekday = property(__get_f_weekday, __set_nothing,
doc="Full weekday names")
a_weekday = property(__get_a_weekday, __set_nothing,
doc="Abbreviated weekday names")
def __get_f_month(self):
# Fetch self.f_month.
if not self.__f_month:
self.__calc_month()
return self.__f_month
def __get_a_month(self):
# Fetch self.a_month.
if not self.__a_month:
self.__calc_month()
return self.__a_month
f_month = property(__get_f_month, __set_nothing,
doc="Full month names (dummy value at index 0)")
a_month = property(__get_a_month, __set_nothing,
doc="Abbreviated month names (dummy value at index 0)")
def __get_am_pm(self):
# Fetch self.am_pm.
if not self.__am_pm:
self.__calc_am_pm()
return self.__am_pm
am_pm = property(__get_am_pm, __set_nothing, doc="AM/PM representation")
def __get_timezone(self):
# Fetch self.timezone.
if not self.__timezone:
self.__calc_timezone()
return self.__timezone
timezone = property(__get_timezone, __set_nothing,
doc="Timezone representation (dummy value at index 2)")
def __get_LC_date_time(self):
# Fetch self.LC_date_time.
if not self.__LC_date_time:
self.__calc_date_time()
return self.__LC_date_time
def __get_LC_date(self):
# Fetch self.LC_date.
if not self.__LC_date:
self.__calc_date_time()
return self.__LC_date
def __get_LC_time(self):
# Fetch self.LC_time.
if not self.__LC_time:
self.__calc_date_time()
return self.__LC_time
LC_date_time = property(
__get_LC_date_time, __set_nothing,
doc=
"Format string for locale's date/time representation ('%c' format)")
LC_date = property(__get_LC_date, __set_nothing,
doc="Format string for locale's date representation ('%x' format)")
LC_time = property(__get_LC_time, __set_nothing,
doc="Format string for locale's time representation ('%X' format)")
lang = property(lambda self: self.__lang, __set_nothing,
doc="Language used for instance")
def __calc_weekday(self):
# Set self.__a_weekday and self.__f_weekday using the calendar
# module.
a_weekday = [calendar.day_abbr[i] for i in range(7)]
f_weekday = [calendar.day_name[i] for i in range(7)]
if not self.__a_weekday:
self.__a_weekday = a_weekday
if not self.__f_weekday:
self.__f_weekday = f_weekday
def __calc_month(self):
# Set self.__f_month and self.__a_month using the calendar module.
a_month = [calendar.month_abbr[i] for i in range(13)]
f_month = [calendar.month_name[i] for i in range(13)]
if not self.__a_month:
self.__a_month = a_month
if not self.__f_month:
self.__f_month = f_month
def __calc_am_pm(self):
# Set self.__am_pm by using time.strftime().
# The magic date (1999,3,17,hour,44,55,2,76,0) is not really that
# magical; just happened to have used it everywhere else where a
# static date was needed.
am_pm = []
for hour in (01,22):
time_tuple = time.struct_time((1999,3,17,hour,44,55,2,76,0))
am_pm.append(time.strftime("%p", time_tuple))
self.__am_pm = am_pm
def __calc_date_time(self):
# Set self.__date_time, self.__date, & self.__time by using
# time.strftime().
# Use (1999,3,17,22,44,55,2,76,0) for magic date because the amount of
# overloaded numbers is minimized. The order in which searches for
# values within the format string is very important; it eliminates
# possible ambiguity for what something represents.
time_tuple = time.struct_time((1999,3,17,22,44,55,2,76,0))
date_time = [None, None, None]
date_time[0] = time.strftime("%c", time_tuple)
date_time[1] = time.strftime("%x", time_tuple)
date_time[2] = time.strftime("%X", time_tuple)
for offset,directive in ((0,'%c'), (1,'%x'), (2,'%X')):
current_format = date_time[offset]
for old, new in (
('%', '%%'), (self.f_weekday[2], '%A'),
(self.f_month[3], '%B'), (self.a_weekday[2], '%a'),
(self.a_month[3], '%b'), (self.am_pm[1], '%p'),
(self.timezone[0], '%Z'), (self.timezone[1], '%Z'),
('1999', '%Y'), ('99', '%y'), ('22', '%H'),
('44', '%M'), ('55', '%S'), ('76', '%j'),
('17', '%d'), ('03', '%m'), ('3', '%m'),
# '3' needed for when no leading zero.
('2', '%w'), ('10', '%I')):
# Must deal with possible lack of locale info
# manifesting itself as the empty string (e.g., Swedish's
# lack of AM/PM info) or a platform returning a tuple of empty
# strings (e.g., MacOS 9 having timezone as ('','')).
if old:
current_format = current_format.replace(old, new)
time_tuple = time.struct_time((1999,1,3,1,1,1,6,3,0))
if time.strftime(directive, time_tuple).find('00'):
U_W = '%U'
else:
U_W = '%W'
date_time[offset] = current_format.replace('11', U_W)
if not self.__LC_date_time:
self.__LC_date_time = date_time[0]
if not self.__LC_date:
self.__LC_date = date_time[1]
if not self.__LC_time:
self.__LC_time = date_time[2]
def __calc_timezone(self):
# Set self.__timezone by using time.tzname.
#
# Empty string used for matching when timezone is not used/needed.
try:
time.tzset()
except AttributeError:
pass
time_zones = ["UTC", "GMT"]
if time.daylight:
time_zones.extend(time.tzname)
else:
time_zones.append(time.tzname[0])
self.__timezone = self.__pad(time_zones, 0)
class TimeRE(dict):
"""Handle conversion from format directives to regexes."""
def __init__(self, locale_time=None):
"""Init inst with non-locale regexes and store LocaleTime object."""
#XXX: Does 'Y' need to worry about having less or more than 4 digits?
base = super(TimeRE, self)
base.__init__({
# The " \d" option is to make %c from ANSI C work
'd': r"(?P<d>3[0-1]|[1-2]\d|0[1-9]|[1-9]| [1-9])",
'H': r"(?P<H>2[0-3]|[0-1]\d|\d)",
'I': r"(?P<I>1[0-2]|0[1-9]|[1-9])",
'j': r"(?P<j>36[0-6]|3[0-5]\d|[1-2]\d\d|0[1-9]\d|00[1-9]|[1-9]\d|0[1-9]|[1-9])",
'm': r"(?P<m>1[0-2]|0[1-9]|[1-9])",
'M': r"(?P<M>[0-5]\d|\d)",
'S': r"(?P<S>6[0-1]|[0-5]\d|\d)",
'U': r"(?P<U>5[0-3]|[0-4]\d|\d)",
'w': r"(?P<w>[0-6])",
# W is set below by using 'U'
'y': r"(?P<y>\d\d)",
'Y': r"(?P<Y>\d\d\d\d)"})
base.__setitem__('W', base.__getitem__('U'))
if locale_time:
self.locale_time = locale_time
else:
self.locale_time = LocaleTime()
def __getitem__(self, fetch):
"""Try to fetch regex; if it does not exist, construct it."""
try:
return super(TimeRE, self).__getitem__(fetch)
except KeyError:
constructors = {
'A': lambda: self.__seqToRE(self.locale_time.f_weekday, fetch),
'a': lambda: self.__seqToRE(self.locale_time.a_weekday, fetch),
'B': lambda: self.__seqToRE(self.locale_time.f_month[1:],
fetch),
'b': lambda: self.__seqToRE(self.locale_time.a_month[1:],
fetch),
'c': lambda: self.pattern(self.locale_time.LC_date_time),
'p': lambda: self.__seqToRE(self.locale_time.am_pm, fetch),
'x': lambda: self.pattern(self.locale_time.LC_date),
'X': lambda: self.pattern(self.locale_time.LC_time),
'Z': lambda: self.__seqToRE(self.locale_time.timezone, fetch),
'%': lambda: '%',
}
if fetch in constructors:
self[fetch] = constructors[fetch]()
return self[fetch]
else:
raise
def __seqToRE(self, to_convert, directive):
"""Convert a list to a regex string for matching a directive."""
def sorter(a, b):
"""Sort based on length.
Done in case for some strange reason that names in the locale only
differ by a suffix and thus want the name with the suffix to match
first.
"""
try:
a_length = len(a)
except TypeError:
a_length = 0
try:
b_length = len(b)
except TypeError:
b_length = 0
return cmp(b_length, a_length)
to_convert = to_convert[:] # Don't want to change value in-place.
for value in to_convert:
if value != '':
break
else:
return ''
to_convert.sort(sorter)
regex = '|'.join(to_convert)
regex = '(?P<%s>%s' % (directive, regex)
return '%s)' % regex
def pattern(self, format):
"""Return re pattern for the format string.
Need to make sure that any characters that might be interpreted as
regex syntax is escaped.
"""
processed_format = ''
# The sub() call escapes all characters that might be misconstrued
# as regex syntax.
regex_chars = re_compile(r"([\\.^$*+?i\(\){}\[\]|])")
format = regex_chars.sub(r"\\\1", format)
whitespace_replacement = re_compile('\s+')
format = whitespace_replacement.sub('\s*', format)
while format.find('%') != -1:
directive_index = format.index('%')+1
processed_format = "%s%s%s" % (processed_format,
format[:directive_index-1],
self[format[directive_index]])
format = format[directive_index+1:]
return "%s%s" % (processed_format, format)
def compile(self, format):
"""Return a compiled re object for the format string."""
return re_compile(self.pattern(format), IGNORECASE)
# Cached TimeRE; probably only need one instance ever so cache it for performance
_locale_cache = TimeRE()
# Cached regex objects; same reason as for TimeRE cache
_regex_cache = dict()
def strptime(data_string, format="%a %b %d %H:%M:%S %Y"):
"""Return a time struct based on the input data and the format string."""
global _locale_cache
global _regex_cache
locale_time = _locale_cache.locale_time
# If the language changes, caches are invalidated, so clear them
if locale_time.lang != _getlang():
_locale_cache = TimeRE()
_regex_cache.clear()
format_regex = _regex_cache.get(format)
if not format_regex:
# Limit regex cache size to prevent major bloating of the module;
# The value 5 is arbitrary
if len(_regex_cache) > 5:
_regex_cache.clear()
format_regex = _locale_cache.compile(format)
_regex_cache[format] = format_regex
found = format_regex.match(data_string)
if not found:
raise ValueError("time data did not match format: data=%s fmt=%s" %
(data_string, format))
if len(data_string) != found.end():
raise ValueError("unconverted data remains: %s" %
data_string[found.end():])
year = 1900
month = day = 1
hour = minute = second = 0
tz = -1
# weekday and julian defaulted to -1 so as to signal need to calculate values
weekday = julian = -1
found_dict = found.groupdict()
for group_key in found_dict.iterkeys():
if group_key == 'y':
year = int(found_dict['y'])
# Open Group specification for strptime() states that a %y
#value in the range of [00, 68] is in the century 2000, while
#[69,99] is in the century 1900
if year <= 68:
year += 2000
else:
year += 1900
elif group_key == 'Y':
year = int(found_dict['Y'])
elif group_key == 'm':
month = int(found_dict['m'])
elif group_key == 'B':
month = _insensitiveindex(locale_time.f_month, found_dict['B'])
elif group_key == 'b':
month = _insensitiveindex(locale_time.a_month, found_dict['b'])
elif group_key == 'd':
day = int(found_dict['d'])
elif group_key == 'H':
hour = int(found_dict['H'])
elif group_key == 'I':
hour = int(found_dict['I'])
ampm = found_dict.get('p', '').lower()
# If there was no AM/PM indicator, we'll treat this like AM
if ampm in ('', locale_time.am_pm[0].lower()):
# We're in AM so the hour is correct unless we're
# looking at 12 midnight.
# 12 midnight == 12 AM == hour 0
if hour == 12:
hour = 0
elif ampm == locale_time.am_pm[1].lower():
# We're in PM so we need to add 12 to the hour unless
# we're looking at 12 noon.
# 12 noon == 12 PM == hour 12
if hour != 12:
hour += 12
elif group_key == 'M':
minute = int(found_dict['M'])
elif group_key == 'S':
second = int(found_dict['S'])
elif group_key == 'A':
weekday = _insensitiveindex(locale_time.f_weekday,
found_dict['A'])
elif group_key == 'a':
weekday = _insensitiveindex(locale_time.a_weekday,
found_dict['a'])
elif group_key == 'w':
weekday = int(found_dict['w'])
if weekday == 0:
weekday = 6
else:
weekday -= 1
elif group_key == 'j':
julian = int(found_dict['j'])
elif group_key == 'Z':
# Since -1 is default value only need to worry about setting tz if
# it can be something other than -1.
found_zone = found_dict['Z'].lower()
if found_zone in ("utc", "gmt"):
tz = 0
elif time.tzname[0] == time.tzname[1] and \
time.daylight:
continue #Deals with bad locale setup where timezone info is
# the same; first found on FreeBSD 4.4.
elif locale_time.timezone[2].lower() == found_zone:
tz = 0
elif time.daylight and \
locale_time.timezone[3].lower() == found_zone:
tz = 1
# Cannot pre-calculate datetime_date() since can change in Julian
#calculation and thus could have different value for the day of the week
#calculation
if julian == -1:
# Need to add 1 to result since first day of the year is 1, not 0.
julian = datetime_date(year, month, day).toordinal() - \
datetime_date(year, 1, 1).toordinal() + 1
else: # Assume that if they bothered to include Julian day it will
#be accurate
datetime_result = datetime_date.fromordinal((julian - 1) + datetime_date(year, 1, 1).toordinal())
year = datetime_result.year
month = datetime_result.month
day = datetime_result.day
if weekday == -1:
weekday = datetime_date(year, month, day).weekday()
return time.struct_time((year, month, day,
hour, minute, second,
weekday, julian, tz))
def _insensitiveindex(lst, findme):
# Perform a case-insensitive index search.
#XXX <bc>: If LocaleTime is not exposed, then consider removing this and
# just lowercase when LocaleTime sets its vars and lowercasing
# search values.
findme = findme.lower()
for key,item in enumerate(lst):
if item.lower() == findme:
return key
else:
raise ValueError("value not in list")
Computing file changes ...