diff options
Diffstat (limited to 'babel/dates.py')
| -rw-r--r-- | babel/dates.py | 991 |
1 files changed, 0 insertions, 991 deletions
diff --git a/babel/dates.py b/babel/dates.py deleted file mode 100644 index 8d1b4f7..0000000 --- a/babel/dates.py +++ /dev/null @@ -1,991 +0,0 @@ -# -*- 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 assocaited 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 frensh the central europian 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 parse_pattern(format).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, 'localize'): # 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', "'")) |