/django/branches/0.95-bugfixes/django/utils/dateformat.py
Python | 257 lines | 244 code | 0 blank | 13 comment | 3 complexity | aff32d75e86e5ece31e4554f22fa54cf MD5 | raw file
Possible License(s): BSD-3-Clause
- """
- PHP date() style date formatting
- See http://www.php.net/date for format strings
- Usage:
- >>> import datetime
- >>> d = datetime.datetime.now()
- >>> df = DateFormat(d)
- >>> print df.format('jS F Y H:i')
- 7th October 2003 11:39
- >>>
- """
- from django.utils.dates import MONTHS, MONTHS_AP, WEEKDAYS
- from django.utils.tzinfo import LocalTimezone
- from calendar import isleap, monthrange
- import re, time
- re_formatchars = re.compile(r'(?<!\\)([aABdDfFgGhHiIjlLmMnNOPrsStTUwWyYzZ])')
- re_escaped = re.compile(r'\\(.)')
- class Formatter(object):
- def format(self, formatstr):
- pieces = []
- for i, piece in enumerate(re_formatchars.split(formatstr)):
- if i % 2:
- pieces.append(str(getattr(self, piece)()))
- elif piece:
- pieces.append(re_escaped.sub(r'\1', piece))
- return ''.join(pieces)
- class TimeFormat(Formatter):
- def __init__(self, t):
- self.data = t
- def a(self):
- "'a.m.' or 'p.m.'"
- if self.data.hour > 11:
- return 'p.m.'
- return 'a.m.'
- def A(self):
- "'AM' or 'PM'"
- if self.data.hour > 11:
- return 'PM'
- return 'AM'
- def B(self):
- "Swatch Internet time"
- raise NotImplementedError
- def f(self):
- """
- Time, in 12-hour hours and minutes, with minutes left off if they're zero.
- Examples: '1', '1:30', '2:05', '2'
- Proprietary extension.
- """
- if self.data.minute == 0:
- return self.g()
- return '%s:%s' % (self.g(), self.i())
- def g(self):
- "Hour, 12-hour format without leading zeros; i.e. '1' to '12'"
- if self.data.hour == 0:
- return 12
- if self.data.hour > 12:
- return self.data.hour - 12
- return self.data.hour
- def G(self):
- "Hour, 24-hour format without leading zeros; i.e. '0' to '23'"
- return self.data.hour
- def h(self):
- "Hour, 12-hour format; i.e. '01' to '12'"
- return '%02d' % self.g()
- def H(self):
- "Hour, 24-hour format; i.e. '00' to '23'"
- return '%02d' % self.G()
- def i(self):
- "Minutes; i.e. '00' to '59'"
- return '%02d' % self.data.minute
- def P(self):
- """
- Time, in 12-hour hours, minutes and 'a.m.'/'p.m.', with minutes left off
- if they're zero and the strings 'midnight' and 'noon' if appropriate.
- Examples: '1 a.m.', '1:30 p.m.', 'midnight', 'noon', '12:30 p.m.'
- Proprietary extension.
- """
- if self.data.minute == 0 and self.data.hour == 0:
- return 'midnight'
- if self.data.minute == 0 and self.data.hour == 12:
- return 'noon'
- return '%s %s' % (self.f(), self.a())
- def s(self):
- "Seconds; i.e. '00' to '59'"
- return '%02d' % self.data.second
- class DateFormat(TimeFormat):
- year_days = [None, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334]
- def __init__(self, dt):
- # Accepts either a datetime or date object.
- self.data = dt
- self.timezone = getattr(dt, 'tzinfo', None)
- if hasattr(self.data, 'hour') and not self.timezone:
- self.timezone = LocalTimezone(dt)
- def d(self):
- "Day of the month, 2 digits with leading zeros; i.e. '01' to '31'"
- return '%02d' % self.data.day
- def D(self):
- "Day of the week, textual, 3 letters; e.g. 'Fri'"
- return WEEKDAYS[self.data.weekday()][0:3]
- def F(self):
- "Month, textual, long; e.g. 'January'"
- return MONTHS[self.data.month]
- def I(self):
- "'1' if Daylight Savings Time, '0' otherwise."
- if self.timezone.dst(self.data):
- return '1'
- else:
- return '0'
- def j(self):
- "Day of the month without leading zeros; i.e. '1' to '31'"
- return self.data.day
- def l(self):
- "Day of the week, textual, long; e.g. 'Friday'"
- return WEEKDAYS[self.data.weekday()]
- def L(self):
- "Boolean for whether it is a leap year; i.e. True or False"
- return isleap(self.data.year)
- def m(self):
- "Month; i.e. '01' to '12'"
- return '%02d' % self.data.month
- def M(self):
- "Month, textual, 3 letters; e.g. 'Jan'"
- return MONTHS[self.data.month][0:3]
- def n(self):
- "Month without leading zeros; i.e. '1' to '12'"
- return self.data.month
- def N(self):
- "Month abbreviation in Associated Press style. Proprietary extension."
- return MONTHS_AP[self.data.month]
- def O(self):
- "Difference to Greenwich time in hours; e.g. '+0200'"
- tz = self.timezone.utcoffset(self.data)
- return "%+03d%02d" % (tz.seconds // 3600, (tz.seconds // 60) % 60)
- def r(self):
- "RFC 822 formatted date; e.g. 'Thu, 21 Dec 2000 16:01:07 +0200'"
- return self.format('D, j M Y H:i:s O')
- def S(self):
- "English ordinal suffix for the day of the month, 2 characters; i.e. 'st', 'nd', 'rd' or 'th'"
- if self.data.day in (11, 12, 13): # Special case
- return 'th'
- last = self.data.day % 10
- if last == 1:
- return 'st'
- if last == 2:
- return 'nd'
- if last == 3:
- return 'rd'
- return 'th'
- def t(self):
- "Number of days in the given month; i.e. '28' to '31'"
- return '%02d' % monthrange(self.data.year, self.data.month)[1]
- def T(self):
- "Time zone of this machine; e.g. 'EST' or 'MDT'"
- name = self.timezone.tzname(self.data)
- if name is None:
- name = self.format('O')
- return name
- def U(self):
- "Seconds since the Unix epoch (January 1 1970 00:00:00 GMT)"
- off = self.timezone.utcoffset(self.data)
- return int(time.mktime(self.data.timetuple())) + off.seconds * 60
- def w(self):
- "Day of the week, numeric, i.e. '0' (Sunday) to '6' (Saturday)"
- return (self.data.weekday() + 1) % 7
- def W(self):
- "ISO-8601 week number of year, weeks starting on Monday"
- # Algorithm from http://www.personal.ecu.edu/mccartyr/ISOwdALG.txt
- week_number = None
- jan1_weekday = self.data.replace(month=1, day=1).weekday() + 1
- weekday = self.data.weekday() + 1
- day_of_year = self.z()
- if day_of_year <= (8 - jan1_weekday) and jan1_weekday > 4:
- if jan1_weekday == 5 or (jan1_weekday == 6 and isleap(self.data.year-1)):
- week_number = 53
- else:
- week_number = 52
- else:
- if isleap(self.data.year):
- i = 366
- else:
- i = 365
- if (i - day_of_year) < (4 - weekday):
- week_number = 1
- else:
- j = day_of_year + (7 - weekday) + (jan1_weekday - 1)
- week_number = j / 7
- if jan1_weekday > 4:
- week_number -= 1
- return week_number
- def y(self):
- "Year, 2 digits; e.g. '99'"
- return str(self.data.year)[2:]
- def Y(self):
- "Year, 4 digits; e.g. '1999'"
- return self.data.year
- def z(self):
- "Day of the year; i.e. '0' to '365'"
- doy = self.year_days[self.data.month] + self.data.day
- if self.L() and self.data.month > 2:
- doy += 1
- return doy
- def Z(self):
- """Time zone offset in seconds (i.e. '-43200' to '43200'). The offset
- for timezones west of UTC is always negative, and for those east of UTC
- is always positive."""
- return self.timezone.utcoffset(self.data).seconds
- def format(value, format_string):
- "Convenience function"
- df = DateFormat(value)
- return df.format(format_string)
- def time_format(value, format_string):
- "Convenience function"
- tf = TimeFormat(value)
- return tf.format(format_string)