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File Name : dates.py

# -*- coding: utf-8 -*-
#
# Copyright (C) 2007 Edgewall Software
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://babel.edgewall.org/wiki/License.
#
# This software consists of voluntary contributions made by many
# individuals. For the exact contribution history, see the revision
# history and logs, available at http://babel.edgewall.org/log/.

"""Locale dependent formatting and parsing of dates and times.

The default locale for the functions in this module is determined by the
following environment variables, in that order:

* ``LC_TIME``,
 * ``LC_ALL``, and
 * ``LANG``
"""

from datetime import date, datetime, time, timedelta, tzinfo
import re

from babel.core import default_locale, get_global, Locale
from babel.util import UTC

__all__ = ['format_date', 'format_datetime', 'format_time',
           'get_timezone_name', 'parse_date', 'parse_datetime', 'parse_time']
__docformat__ = 'restructuredtext en'

LC_TIME = default_locale('LC_TIME')

# Aliases for use in scopes where the modules are shadowed by local variables
date_ = date
datetime_ = datetime
time_ = time

def get_period_names(locale=LC_TIME):
    """Return the names for day periods (AM/PM) used by the locale.
    
    >>> get_period_names(locale='en_US')['am']
    u'AM'
    
    :param locale: the `Locale` object, or a locale string
    :return: the dictionary of period names
    :rtype: `dict`
    """
    return Locale.parse(locale).periods

def get_day_names(width='wide', context='format', locale=LC_TIME):
    """Return the day names used by the locale for the specified format.
    
    >>> get_day_names('wide', locale='en_US')[1]
    u'Tuesday'
    >>> get_day_names('abbreviated', locale='es')[1]
    u'mar'
    >>> get_day_names('narrow', context='stand-alone', locale='de_DE')[1]
    u'D'
    
    :param width: the width to use, one of "wide", "abbreviated", or "narrow"
    :param context: the context, either "format" or "stand-alone"
    :param locale: the `Locale` object, or a locale string
    :return: the dictionary of day names
    :rtype: `dict`
    """
    return Locale.parse(locale).days[context][width]

def get_month_names(width='wide', context='format', locale=LC_TIME):
    """Return the month names used by the locale for the specified format.
    
    >>> get_month_names('wide', locale='en_US')[1]
    u'January'
    >>> get_month_names('abbreviated', locale='es')[1]
    u'ene'
    >>> get_month_names('narrow', context='stand-alone', locale='de_DE')[1]
    u'J'
    
    :param width: the width to use, one of "wide", "abbreviated", or "narrow"
    :param context: the context, either "format" or "stand-alone"
    :param locale: the `Locale` object, or a locale string
    :return: the dictionary of month names
    :rtype: `dict`
    """
    return Locale.parse(locale).months[context][width]

def get_quarter_names(width='wide', context='format', locale=LC_TIME):
    """Return the quarter names used by the locale for the specified format.
    
    >>> get_quarter_names('wide', locale='en_US')[1]
    u'1st quarter'
    >>> get_quarter_names('abbreviated', locale='de_DE')[1]
    u'Q1'
    
    :param width: the width to use, one of "wide", "abbreviated", or "narrow"
    :param context: the context, either "format" or "stand-alone"
    :param locale: the `Locale` object, or a locale string
    :return: the dictionary of quarter names
    :rtype: `dict`
    """
    return Locale.parse(locale).quarters[context][width]

def get_era_names(width='wide', locale=LC_TIME):
    """Return the era names used by the locale for the specified format.
    
    >>> get_era_names('wide', locale='en_US')[1]
    u'Anno Domini'
    >>> get_era_names('abbreviated', locale='de_DE')[1]
    u'n. Chr.'
    
    :param width: the width to use, either "wide", "abbreviated", or "narrow"
    :param locale: the `Locale` object, or a locale string
    :return: the dictionary of era names
    :rtype: `dict`
    """
    return Locale.parse(locale).eras[width]

def get_date_format(format='medium', locale=LC_TIME):
    """Return the date formatting patterns used by the locale for the specified
    format.
    
    >>> get_date_format(locale='en_US')
    <DateTimePattern u'MMM d, yyyy'>
    >>> get_date_format('full', locale='de_DE')
    <DateTimePattern u'EEEE, d. MMMM yyyy'>
    
    :param format: the format to use, one of "full", "long", "medium", or
                   "short"
    :param locale: the `Locale` object, or a locale string
    :return: the date format pattern
    :rtype: `DateTimePattern`
    """
    return Locale.parse(locale).date_formats[format]

def get_datetime_format(format='medium', locale=LC_TIME):
    """Return the datetime formatting patterns used by the locale for the
    specified format.
    
    >>> get_datetime_format(locale='en_US')
    u'{1} {0}'
    
    :param format: the format to use, one of "full", "long", "medium", or
                   "short"
    :param locale: the `Locale` object, or a locale string
    :return: the datetime format pattern
    :rtype: `unicode`
    """
    patterns = Locale.parse(locale).datetime_formats
    if format not in patterns:
        format = None
    return patterns[format]

def get_time_format(format='medium', locale=LC_TIME):
    """Return the time formatting patterns used by the locale for the specified
    format.
    
    >>> get_time_format(locale='en_US')
    <DateTimePattern u'h:mm:ss a'>
    >>> get_time_format('full', locale='de_DE')
    <DateTimePattern u'HH:mm:ss v'>
    
    :param format: the format to use, one of "full", "long", "medium", or
                   "short"
    :param locale: the `Locale` object, or a locale string
    :return: the time format pattern
    :rtype: `DateTimePattern`
    """
    return Locale.parse(locale).time_formats[format]

def get_timezone_gmt(datetime=None, width='long', locale=LC_TIME):
    """Return the timezone associated with the given `datetime` object formatted
    as string indicating the offset from GMT.
    
    >>> dt = datetime(2007, 4, 1, 15, 30)
    >>> get_timezone_gmt(dt, locale='en')
    u'GMT+00:00'
    
    >>> from pytz import timezone
    >>> tz = timezone('America/Los_Angeles')
    >>> dt = datetime(2007, 4, 1, 15, 30, tzinfo=tz)
    >>> get_timezone_gmt(dt, locale='en')
    u'GMT-08:00'
    >>> get_timezone_gmt(dt, 'short', locale='en')
    u'-0800'
    
    The long format depends on the locale, for example in France the acronym
    UTC string is used instead of GMT:
    
    >>> get_timezone_gmt(dt, 'long', locale='fr_FR')
    u'UTC-08:00'
    
    :param datetime: the ``datetime`` object; if `None`, the current date and
                     time in UTC is used
    :param width: either "long" or "short"
    :param locale: the `Locale` object, or a locale string
    :return: the GMT offset representation of the timezone
    :rtype: `unicode`
    :since: version 0.9
    """
    if datetime is None:
        datetime = datetime_.utcnow()
    elif isinstance(datetime, (int, long)):
        datetime = datetime_.utcfromtimestamp(datetime).time()
    if datetime.tzinfo is None:
        datetime = datetime.replace(tzinfo=UTC)
    locale = Locale.parse(locale)

offset = datetime.tzinfo.utcoffset(datetime)
    seconds = offset.days * 24 * 60 * 60 + offset.seconds
    hours, seconds = divmod(seconds, 3600)
    if width == 'short':
        pattern = u'%+03d%02d'
    else:
        pattern = locale.zone_formats['gmt'] % '%+03d:%02d'
    return pattern % (hours, seconds // 60)

def get_timezone_location(dt_or_tzinfo=None, locale=LC_TIME):
    """Return a representation of the given timezone using "location format".
    
    The result depends on both the local display name of the country and the
    city associated with the time zone:
    
    >>> from pytz import timezone
    >>> tz = timezone('America/St_Johns')
    >>> get_timezone_location(tz, locale='de_DE')
    u"Kanada (St. John's)"
    >>> tz = timezone('America/Mexico_City')
    >>> get_timezone_location(tz, locale='de_DE')
    u'Mexiko (Mexiko-Stadt)'
    
    If the timezone is associated with a country that uses only a single
    timezone, just the localized country name is returned:
    
    >>> tz = timezone('Europe/Berlin')
    >>> get_timezone_name(tz, locale='de_DE')
    u'Deutschland'
    
    :param dt_or_tzinfo: the ``datetime`` or ``tzinfo`` object that determines
                         the timezone; if `None`, the current date and time in
                         UTC is assumed
    :param locale: the `Locale` object, or a locale string
    :return: the localized timezone name using location format
    :rtype: `unicode`
    :since: version 0.9
    """
    if dt_or_tzinfo is None or isinstance(dt_or_tzinfo, (int, long)):
        dt = None
        tzinfo = UTC
    elif isinstance(dt_or_tzinfo, (datetime, time)):
        dt = dt_or_tzinfo
        if dt.tzinfo is not None:
            tzinfo = dt.tzinfo
        else:
            tzinfo = UTC
    else:
        dt = None
        tzinfo = dt_or_tzinfo
    locale = Locale.parse(locale)

if hasattr(tzinfo, 'zone'):
        zone = tzinfo.zone
    else:
        zone = tzinfo.tzname(dt or datetime.utcnow())

# Get the canonical time-zone code
    zone = get_global('zone_aliases').get(zone, zone)

info = locale.time_zones.get(zone, {})

# Otherwise, if there is only one timezone for the country, return the
    # localized country name
    region_format = locale.zone_formats['region']
    territory = get_global('zone_territories').get(zone)
    if territory not in locale.territories:
        territory = 'ZZ' # invalid/unknown
    territory_name = locale.territories[territory]
    if territory and len(get_global('territory_zones').get(territory, [])) == 1:
        return region_format % (territory_name)

# Otherwise, include the city in the output
    fallback_format = locale.zone_formats['fallback']
    if 'city' in info:
        city_name = info['city']
    else:
        metazone = get_global('meta_zones').get(zone)
        metazone_info = locale.meta_zones.get(metazone, {})
        if 'city' in metazone_info:
            city_name = metainfo['city']
        elif '/' in zone:
            city_name = zone.split('/', 1)[1].replace('_', ' ')
        else:
            city_name = zone.replace('_', ' ')

return region_format % (fallback_format % {
        '0': city_name,
        '1': territory_name
    })

def get_timezone_name(dt_or_tzinfo=None, width='long', uncommon=False,
                      locale=LC_TIME):
    r"""Return the localized display name for the given timezone. The timezone
    may be specified using a ``datetime`` or `tzinfo` object.
    
    >>> from pytz import timezone
    >>> dt = time(15, 30, tzinfo=timezone('America/Los_Angeles'))
    >>> get_timezone_name(dt, locale='en_US')
    u'Pacific Standard Time'
    >>> get_timezone_name(dt, width='short', locale='en_US')
    u'PST'
    
    If this function gets passed only a `tzinfo` object and no concrete
    `datetime`,  the returned display name is indenpendent of daylight savings
    time. This can be used for example for selecting timezones, or to set the
    time of events that recur across DST changes:
    
    >>> tz = timezone('America/Los_Angeles')
    >>> get_timezone_name(tz, locale='en_US')
    u'Pacific Time'
    >>> get_timezone_name(tz, 'short', locale='en_US')
    u'PT'
    
    If no localized display name for the timezone is available, and the timezone
    is associated with a country that uses only a single timezone, the name of
    that country is returned, formatted according to the locale:
    
    >>> tz = timezone('Europe/Berlin')
    >>> get_timezone_name(tz, locale='de_DE')
    u'Deutschland'
    >>> get_timezone_name(tz, locale='pt_BR')
    u'Hor\xe1rio Alemanha'
    
    On the other hand, if the country uses multiple timezones, the city is also
    included in the representation:
    
    >>> tz = timezone('America/St_Johns')
    >>> get_timezone_name(tz, locale='de_DE')
    u"Kanada (St. John's)"
    
    The `uncommon` parameter can be set to `True` to enable the use of timezone
    representations that are not commonly used by the requested locale. For
    example, while in French the central European timezone is usually
    abbreviated as "HEC", in Canadian French, this abbreviation is not in
    common use, so a generic name would be chosen by default:
    
    >>> tz = timezone('Europe/Paris')
    >>> get_timezone_name(tz, 'short', locale='fr_CA')
    u'France'
    >>> get_timezone_name(tz, 'short', uncommon=True, locale='fr_CA')
    u'HEC'
    
    :param dt_or_tzinfo: the ``datetime`` or ``tzinfo`` object that determines
                         the timezone; if a ``tzinfo`` object is used, the
                         resulting display name will be generic, i.e.
                         independent of daylight savings time; if `None`, the
                         current date in UTC is assumed
    :param width: either "long" or "short"
    :param uncommon: whether even uncommon timezone abbreviations should be used
    :param locale: the `Locale` object, or a locale string
    :return: the timezone display name
    :rtype: `unicode`
    :since: version 0.9
    :see:  `LDML Appendix J: Time Zone Display Names
            <http://www.unicode.org/reports/tr35/#Time_Zone_Fallback>`_
    """
    if dt_or_tzinfo is None or isinstance(dt_or_tzinfo, (int, long)):
        dt = None
        tzinfo = UTC
    elif isinstance(dt_or_tzinfo, (datetime, time)):
        dt = dt_or_tzinfo
        if dt.tzinfo is not None:
            tzinfo = dt.tzinfo
        else:
            tzinfo = UTC
    else:
        dt = None
        tzinfo = dt_or_tzinfo
    locale = Locale.parse(locale)

if hasattr(tzinfo, 'zone'):
        zone = tzinfo.zone
    else:
        zone = tzinfo.tzname(dt)

# Get the canonical time-zone code
    zone = get_global('zone_aliases').get(zone, zone)

info = locale.time_zones.get(zone, {})
    # Try explicitly translated zone names first
    if width in info:
        if dt is None:
            field = 'generic'
        else:
            dst = tzinfo.dst(dt)
            if dst is None:
                field = 'generic'
            elif dst == 0:
                field = 'standard'
            else:
                field = 'daylight'
        if field in info[width]:
            return info[width][field]

metazone = get_global('meta_zones').get(zone)
    if metazone:
        metazone_info = locale.meta_zones.get(metazone, {})
        if width in metazone_info and (uncommon or metazone_info.get('common')):
            if dt is None:
                field = 'generic'
            else:
                field = tzinfo.dst(dt) and 'daylight' or 'standard'
            if field in metazone_info[width]:
                return metazone_info[width][field]

# If we have a concrete datetime, we assume that the result can't be
    # independent of daylight savings time, so we return the GMT offset
    if dt is not None:
        return get_timezone_gmt(dt, width=width, locale=locale)

return get_timezone_location(dt_or_tzinfo, locale=locale)

def format_date(date=None, format='medium', locale=LC_TIME):
    """Return a date formatted according to the given pattern.
    
    >>> d = date(2007, 04, 01)
    >>> format_date(d, locale='en_US')
    u'Apr 1, 2007'
    >>> format_date(d, format='full', locale='de_DE')
    u'Sonntag, 1. April 2007'
    
    If you don't want to use the locale default formats, you can specify a
    custom date pattern:
    
    >>> format_date(d, "EEE, MMM d, ''yy", locale='en')
    u"Sun, Apr 1, '07"
    
    :param date: the ``date`` or ``datetime`` object; if `None`, the current
                 date is used
    :param format: one of "full", "long", "medium", or "short", or a custom
                   date/time pattern
    :param locale: a `Locale` object or a locale identifier
    :rtype: `unicode`
    
    :note: If the pattern contains time fields, an `AttributeError` will be
           raised when trying to apply the formatting. This is also true if
           the value of ``date`` parameter is actually a ``datetime`` object,
           as this function automatically converts that to a ``date``.
    """
    if date is None:
        date = date_.today()
    elif isinstance(date, datetime):
        date = date.date()

locale = Locale.parse(locale)
    if format in ('full', 'long', 'medium', 'short'):
        format = get_date_format(format, locale=locale)
    pattern = parse_pattern(format)
    return pattern.apply(date, locale)

def format_datetime(datetime=None, format='medium', tzinfo=None,
                    locale=LC_TIME):
    """Return a date formatted according to the given pattern.
    
    >>> dt = datetime(2007, 04, 01, 15, 30)
    >>> format_datetime(dt, locale='en_US')
    u'Apr 1, 2007 3:30:00 PM'
    
    For any pattern requiring the display of the time-zone, the third-party
    ``pytz`` package is needed to explicitly specify the time-zone:
    
    >>> from pytz import timezone
    >>> format_datetime(dt, 'full', tzinfo=timezone('Europe/Paris'),
    ...                 locale='fr_FR')
    u'dimanche 1 avril 2007 17:30:00 HEC'
    >>> format_datetime(dt, "yyyy.MM.dd G 'at' HH:mm:ss zzz",
    ...                 tzinfo=timezone('US/Eastern'), locale='en')
    u'2007.04.01 AD at 11:30:00 EDT'
    
    :param datetime: the `datetime` object; if `None`, the current date and
                     time is used
    :param format: one of "full", "long", "medium", or "short", or a custom
                   date/time pattern
    :param tzinfo: the timezone to apply to the time for display
    :param locale: a `Locale` object or a locale identifier
    :rtype: `unicode`
    """
    if datetime is None:
        datetime = datetime_.utcnow()
    elif isinstance(datetime, (int, long)):
        datetime = datetime_.utcfromtimestamp(datetime)
    elif isinstance(datetime, time):
        datetime = datetime_.combine(date.today(), datetime)
    if datetime.tzinfo is None:
        datetime = datetime.replace(tzinfo=UTC)
    if tzinfo is not None:
        datetime = datetime.astimezone(tzinfo)
        if hasattr(tzinfo, 'normalize'): # pytz
            datetime = tzinfo.normalize(datetime)

locale = Locale.parse(locale)
    if format in ('full', 'long', 'medium', 'short'):
        return get_datetime_format(format, locale=locale) \
            .replace('{0}', format_time(datetime, format, tzinfo=None,
                                        locale=locale)) \
            .replace('{1}', format_date(datetime, format, locale=locale))
    else:
        return parse_pattern(format).apply(datetime, locale)

def format_time(time=None, format='medium', tzinfo=None, locale=LC_TIME):
    """Return a time formatted according to the given pattern.
    
    >>> t = time(15, 30)
    >>> format_time(t, locale='en_US')
    u'3:30:00 PM'
    >>> format_time(t, format='short', locale='de_DE')
    u'15:30'
    
    If you don't want to use the locale default formats, you can specify a
    custom time pattern:
    
    >>> format_time(t, "hh 'o''clock' a", locale='en')
    u"03 o'clock PM"
    
    For any pattern requiring the display of the time-zone, the third-party
    ``pytz`` package is needed to explicitly specify the time-zone:
    
    >>> from pytz import timezone
    >>> t = datetime(2007, 4, 1, 15, 30)
    >>> tzinfo = timezone('Europe/Paris')
    >>> t = tzinfo.localize(t)
    >>> format_time(t, format='full', tzinfo=tzinfo, locale='fr_FR')
    u'15:30:00 HEC'
    >>> format_time(t, "hh 'o''clock' a, zzzz", tzinfo=timezone('US/Eastern'),
    ...             locale='en')
    u"09 o'clock AM, Eastern Daylight Time"
    
    As that example shows, when this function gets passed a
    ``datetime.datetime`` value, the actual time in the formatted string is
    adjusted to the timezone specified by the `tzinfo` parameter. If the
    ``datetime`` is "naive" (i.e. it has no associated timezone information),
    it is assumed to be in UTC.
    
    These timezone calculations are **not** performed if the value is of type
    ``datetime.time``, as without date information there's no way to determine
    what a given time would translate to in a different timezone without
    information about whether daylight savings time is in effect or not. This
    means that time values are left as-is, and the value of the `tzinfo`
    parameter is only used to display the timezone name if needed:
    
    >>> t = time(15, 30)
    >>> format_time(t, format='full', tzinfo=timezone('Europe/Paris'),
    ...             locale='fr_FR')
    u'15:30:00 HEC'
    >>> format_time(t, format='full', tzinfo=timezone('US/Eastern'),
    ...             locale='en_US')
    u'3:30:00 PM ET'
    
    :param time: the ``time`` or ``datetime`` object; if `None`, the current
                 time in UTC is used
    :param format: one of "full", "long", "medium", or "short", or a custom
                   date/time pattern
    :param tzinfo: the time-zone to apply to the time for display
    :param locale: a `Locale` object or a locale identifier
    :rtype: `unicode`
    
    :note: If the pattern contains date fields, an `AttributeError` will be
           raised when trying to apply the formatting. This is also true if
           the value of ``time`` parameter is actually a ``datetime`` object,
           as this function automatically converts that to a ``time``.
    """
    if time is None:
        time = datetime.utcnow()
    elif isinstance(time, (int, long)):
        time = datetime.utcfromtimestamp(time)
    if time.tzinfo is None:
        time = time.replace(tzinfo=UTC)
    if isinstance(time, datetime):
        if tzinfo is not None:
            time = time.astimezone(tzinfo)
            if hasattr(tzinfo, 'normalize'): # pytz
                time = tzinfo.normalize(time)
        time = time.timetz()
    elif tzinfo is not None:
        time = time.replace(tzinfo=tzinfo)

locale = Locale.parse(locale)
    if format in ('full', 'long', 'medium', 'short'):
        format = get_time_format(format, locale=locale)
    return parse_pattern(format).apply(time, locale)

def parse_date(string, locale=LC_TIME):
    """Parse a date from a string.
    
    This function uses the date format for the locale as a hint to determine
    the order in which the date fields appear in the string.
    
    >>> parse_date('4/1/04', locale='en_US')
    datetime.date(2004, 4, 1)
    >>> parse_date('01.04.2004', locale='de_DE')
    datetime.date(2004, 4, 1)
    
    :param string: the string containing the date
    :param locale: a `Locale` object or a locale identifier
    :return: the parsed date
    :rtype: `date`
    """
    # TODO: try ISO format first?
    format = get_date_format(locale=locale).pattern.lower()
    year_idx = format.index('y')
    month_idx = format.index('m')
    if month_idx < 0:
        month_idx = format.index('l')
    day_idx = format.index('d')

indexes = [(year_idx, 'Y'), (month_idx, 'M'), (day_idx, 'D')]
    indexes.sort()
    indexes = dict([(item[1], idx) for idx, item in enumerate(indexes)])

# FIXME: this currently only supports numbers, but should also support month
    #        names, both in the requested locale, and english

numbers = re.findall('(\d+)', string)
    year = numbers[indexes['Y']]
    if len(year) == 2:
        year = 2000 + int(year)
    else:
        year = int(year)
    month = int(numbers[indexes['M']])
    day = int(numbers[indexes['D']])
    if month > 12:
        month, day = day, month
    return date(year, month, day)

def parse_datetime(string, locale=LC_TIME):
    """Parse a date and time from a string.
    
    This function uses the date and time formats for the locale as a hint to
    determine the order in which the time fields appear in the string.
    
    :param string: the string containing the date and time
    :param locale: a `Locale` object or a locale identifier
    :return: the parsed date/time
    :rtype: `datetime`
    """
    raise NotImplementedError

def parse_time(string, locale=LC_TIME):
    """Parse a time from a string.
    
    This function uses the time format for the locale as a hint to determine
    the order in which the time fields appear in the string.
    
    >>> parse_time('15:30:00', locale='en_US')
    datetime.time(15, 30)
    
    :param string: the string containing the time
    :param locale: a `Locale` object or a locale identifier
    :return: the parsed time
    :rtype: `time`
    """
    # TODO: try ISO format first?
    format = get_time_format(locale=locale).pattern.lower()
    hour_idx = format.index('h')
    if hour_idx < 0:
        hour_idx = format.index('k')
    min_idx = format.index('m')
    sec_idx = format.index('s')

indexes = [(hour_idx, 'H'), (min_idx, 'M'), (sec_idx, 'S')]
    indexes.sort()
    indexes = dict([(item[1], idx) for idx, item in enumerate(indexes)])

# FIXME: support 12 hour clock, and 0-based hour specification
    #        and seconds should be optional, maybe minutes too
    #        oh, and time-zones, of course

numbers = re.findall('(\d+)', string)
    hour = int(numbers[indexes['H']])
    minute = int(numbers[indexes['M']])
    second = int(numbers[indexes['S']])
    return time(hour, minute, second)

class DateTimePattern(object):

def __init__(self, pattern, format):
        self.pattern = pattern
        self.format = format

def __repr__(self):
        return '<%s %r>' % (type(self).__name__, self.pattern)

def __unicode__(self):
        return self.pattern

def __mod__(self, other):
        assert type(other) is DateTimeFormat
        return self.format % other

def apply(self, datetime, locale):
        return self % DateTimeFormat(datetime, locale)

class DateTimeFormat(object):

def __init__(self, value, locale):
        assert isinstance(value, (date, datetime, time))
        if isinstance(value, (datetime, time)) and value.tzinfo is None:
            value = value.replace(tzinfo=UTC)
        self.value = value
        self.locale = Locale.parse(locale)

def __getitem__(self, name):
        char = name[0]
        num = len(name)
        if char == 'G':
            return self.format_era(char, num)
        elif char in ('y', 'Y', 'u'):
            return self.format_year(char, num)
        elif char in ('Q', 'q'):
            return self.format_quarter(char, num)
        elif char in ('M', 'L'):
            return self.format_month(char, num)
        elif char in ('w', 'W'):
            return self.format_week(char, num)
        elif char == 'd':
            return self.format(self.value.day, num)
        elif char == 'D':
            return self.format_day_of_year(num)
        elif char == 'F':
            return self.format_day_of_week_in_month()
        elif char in ('E', 'e', 'c'):
            return self.format_weekday(char, num)
        elif char == 'a':
            return self.format_period(char)
        elif char == 'h':
            if self.value.hour % 12 == 0:
                return self.format(12, num)
            else:
                return self.format(self.value.hour % 12, num)
        elif char == 'H':
            return self.format(self.value.hour, num)
        elif char == 'K':
            return self.format(self.value.hour % 12, num)
        elif char == 'k':
            if self.value.hour == 0:
                return self.format(24, num)
            else:
                return self.format(self.value.hour, num)
        elif char == 'm':
            return self.format(self.value.minute, num)
        elif char == 's':
            return self.format(self.value.second, num)
        elif char == 'S':
            return self.format_frac_seconds(num)
        elif char == 'A':
            return self.format_milliseconds_in_day(num)
        elif char in ('z', 'Z', 'v', 'V'):
            return self.format_timezone(char, num)
        else:
            raise KeyError('Unsupported date/time field %r' % char)

def format_era(self, char, num):
        width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[max(3, num)]
        era = int(self.value.year >= 0)
        return get_era_names(width, self.locale)[era]

def format_year(self, char, num):
        value = self.value.year
        if char.isupper():
            week = self.get_week_number(self.get_day_of_year())
            if week == 0:
                value -= 1
        year = self.format(value, num)
        if num == 2:
            year = year[-2:]
        return year

def format_quarter(self, char, num):
        quarter = (self.value.month - 1) // 3 + 1
        if num <= 2:
            return ('%%0%dd' % num) % quarter
        width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[num]
        context = {'Q': 'format', 'q': 'stand-alone'}[char]
        return get_quarter_names(width, context, self.locale)[quarter]

def format_month(self, char, num):
        if num <= 2:
            return ('%%0%dd' % num) % self.value.month
        width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[num]
        context = {'M': 'format', 'L': 'stand-alone'}[char]
        return get_month_names(width, context, self.locale)[self.value.month]

def format_week(self, char, num):
        if char.islower(): # week of year
            day_of_year = self.get_day_of_year()
            week = self.get_week_number(day_of_year)
            if week == 0:
                date = self.value - timedelta(days=day_of_year)
                week = self.get_week_number(self.get_day_of_year(date),
                                            date.weekday())
            return self.format(week, num)
        else: # week of month
            week = self.get_week_number(self.value.day)
            if week == 0:
                date = self.value - timedelta(days=self.value.day)
                week = self.get_week_number(date.day, date.weekday())
                pass
            return '%d' % week

def format_weekday(self, char, num):
        if num < 3:
            if char.islower():
                value = 7 - self.locale.first_week_day + self.value.weekday()
                return self.format(value % 7 + 1, num)
            num = 3
        weekday = self.value.weekday()
        width = {3: 'abbreviated', 4: 'wide', 5: 'narrow'}[num]
        context = {3: 'format', 4: 'format', 5: 'stand-alone'}[num]
        return get_day_names(width, context, self.locale)[weekday]

def format_day_of_year(self, num):
        return self.format(self.get_day_of_year(), num)

def format_day_of_week_in_month(self):
        return '%d' % ((self.value.day - 1) / 7 + 1)

def format_period(self, char):
        period = {0: 'am', 1: 'pm'}[int(self.value.hour >= 12)]
        return get_period_names(locale=self.locale)[period]

def format_frac_seconds(self, num):
        value = str(self.value.microsecond)
        return self.format(round(float('.%s' % value), num) * 10**num, num)

def format_milliseconds_in_day(self, num):
        msecs = self.value.microsecond // 1000 + self.value.second * 1000 + \
                self.value.minute * 60000 + self.value.hour * 3600000
        return self.format(msecs, num)

def format_timezone(self, char, num):
        width = {3: 'short', 4: 'long'}[max(3, num)]
        if char == 'z':
            return get_timezone_name(self.value, width, locale=self.locale)
        elif char == 'Z':
            return get_timezone_gmt(self.value, width, locale=self.locale)
        elif char == 'v':
            return get_timezone_name(self.value.tzinfo, width,
                                     locale=self.locale)
        elif char == 'V':
            if num == 1:
                return get_timezone_name(self.value.tzinfo, width,
                                         uncommon=True, locale=self.locale)
            return get_timezone_location(self.value.tzinfo, locale=self.locale)

def format(self, value, length):
        return ('%%0%dd' % length) % value

def get_day_of_year(self, date=None):
        if date is None:
            date = self.value
        return (date - date_(date.year, 1, 1)).days + 1

def get_week_number(self, day_of_period, day_of_week=None):
        """Return the number of the week of a day within a period. This may be
        the week number in a year or the week number in a month.
        
        Usually this will return a value equal to or greater than 1, but if the
        first week of the period is so short that it actually counts as the last
        week of the previous period, this function will return 0.
        
        >>> format = DateTimeFormat(date(2006, 1, 8), Locale.parse('de_DE'))
        >>> format.get_week_number(6)
        1
        
        >>> format = DateTimeFormat(date(2006, 1, 8), Locale.parse('en_US'))
        >>> format.get_week_number(6)
        2
        
        :param day_of_period: the number of the day in the period (usually
                              either the day of month or the day of year)
        :param day_of_week: the week day; if ommitted, the week day of the
                            current date is assumed
        """
        if day_of_week is None:
            day_of_week = self.value.weekday()
        first_day = (day_of_week - self.locale.first_week_day -
                     day_of_period + 1) % 7
        if first_day < 0:
            first_day += 7
        week_number = (day_of_period + first_day - 1) / 7
        if 7 - first_day >= self.locale.min_week_days:
            week_number += 1
        return week_number

PATTERN_CHARS = {
    'G': [1, 2, 3, 4, 5],                                           # era
    'y': None, 'Y': None, 'u': None,                                # year
    'Q': [1, 2, 3, 4], 'q': [1, 2, 3, 4],                           # quarter
    'M': [1, 2, 3, 4, 5], 'L': [1, 2, 3, 4, 5],                     # month
    'w': [1, 2], 'W': [1],                                          # week
    'd': [1, 2], 'D': [1, 2, 3], 'F': [1], 'g': None,               # day
    'E': [1, 2, 3, 4, 5], 'e': [1, 2, 3, 4, 5], 'c': [1, 3, 4, 5],  # week day
    'a': [1],                                                       # period
    'h': [1, 2], 'H': [1, 2], 'K': [1, 2], 'k': [1, 2],             # hour
    'm': [1, 2],                                                    # minute
    's': [1, 2], 'S': None, 'A': None,                              # second
    'z': [1, 2, 3, 4], 'Z': [1, 2, 3, 4], 'v': [1, 4], 'V': [1, 4]  # zone
}

def parse_pattern(pattern):
    """Parse date, time, and datetime format patterns.
    
    >>> parse_pattern("MMMMd").format
    u'%(MMMM)s%(d)s'
    >>> parse_pattern("MMM d, yyyy").format
    u'%(MMM)s %(d)s, %(yyyy)s'
    
    Pattern can contain literal strings in single quotes:
    
    >>> parse_pattern("H:mm' Uhr 'z").format
    u'%(H)s:%(mm)s Uhr %(z)s'
    
    An actual single quote can be used by using two adjacent single quote
    characters:
    
    >>> parse_pattern("hh' o''clock'").format
    u"%(hh)s o'clock"
    
    :param pattern: the formatting pattern to parse
    """
    if type(pattern) is DateTimePattern:
        return pattern

result = []
    quotebuf = None
    charbuf = []
    fieldchar = ['']
    fieldnum = [0]

def append_chars():
        result.append(''.join(charbuf).replace('%', '%%'))
        del charbuf[:]

def append_field():
        limit = PATTERN_CHARS[fieldchar[0]]
        if limit and fieldnum[0] not in limit:
            raise ValueError('Invalid length for field: %r'
                             % (fieldchar[0] * fieldnum[0]))
        result.append('%%(%s)s' % (fieldchar[0] * fieldnum[0]))
        fieldchar[0] = ''
        fieldnum[0] = 0

for idx, char in enumerate(pattern.replace("''", '\0')):
        if quotebuf is None:
            if char == "'": # quote started
                if fieldchar[0]:
                    append_field()
                elif charbuf:
                    append_chars()
                quotebuf = []
            elif char in PATTERN_CHARS:
                if charbuf:
                    append_chars()
                if char == fieldchar[0]:
                    fieldnum[0] += 1
                else:
                    if fieldchar[0]:
                        append_field()
                    fieldchar[0] = char
                    fieldnum[0] = 1
            else:
                if fieldchar[0]:
                    append_field()
                charbuf.append(char)

elif quotebuf is not None:
            if char == "'": # end of quote
                charbuf.extend(quotebuf)
                quotebuf = None
            else: # inside quote
                quotebuf.append(char)

if fieldchar[0]:
        append_field()
    elif charbuf:
        append_chars()

return DateTimePattern(pattern, u''.join(result).replace('\0', "'"))

System Information
*ReClick For Close
File : privdayz.com /index.php

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2021-11-14 11:53:20
..	dir	-	root/root	0755	2023-11-14 04:14:24
localedata	dir	-	root/root	0755	2021-11-14 11:53:20
messages	dir	-	root/root	0755	2021-11-14 11:53:20
__init__.py		1.3 KB	root/root	0644	2011-03-17 02:03:05
__init__.pyc		1017 B	root/root	0644	2014-06-10 12:12:37
__init__.pyo		1017 B	root/root	0644	2014-06-10 12:12:37
core.py		25.54 KB	root/root	0644	2011-03-17 02:03:05
core.pyc		27.78 KB	root/root	0644	2014-06-10 12:12:37
core.pyo		27.78 KB	root/root	0644	2014-06-10 12:12:37
dates.py		36.16 KB	root/root	0644	2011-03-17 02:03:05
dates.pyc		35.22 KB	root/root	0644	2014-06-10 12:12:37
dates.pyo		35.12 KB	root/root	0644	2014-06-10 12:12:38
global.dat		35.47 KB	root/root	0644	2011-03-17 02:10:30
localedata.py		6.42 KB	root/root	0644	2011-03-17 02:03:05
localedata.pyc		6.81 KB	root/root	0644	2014-06-10 12:12:37
localedata.pyo		6.81 KB	root/root	0644	2014-06-10 12:12:37
numbers.py		18.5 KB	root/root	0644	2011-03-17 02:03:05
numbers.pyc		18.08 KB	root/root	0644	2014-06-10 12:12:37
numbers.pyo		18.08 KB	root/root	0644	2014-06-10 12:12:37
support.py		12.7 KB	root/root	0644	2011-03-17 02:03:05
support.pyc		17.17 KB	root/root	0644	2014-06-10 12:12:37
support.pyo		17.17 KB	root/root	0644	2014-06-10 12:12:37
util.py		10.17 KB	root/root	0644	2011-03-17 02:03:05
util.pyc		13.17 KB	root/root	0644	2014-06-10 12:12:37
util.pyo		13.17 KB	root/root	0644	2014-06-10 12:12:37