Python tzinfo.LocalTimezone类代码示例

def new_date(old_date, reverse=False):
    if old_date is None:
        return None
    tz = LocalTimezone(old_date)
    offset = tz.utcoffset(old_date)
    if reverse:
        offset = -offset
    return old_date - offset

 def __init__(self, dt):
     # Accepts either a datetime or date object.
     self.data = dt
     self.timezone = None
     if isinstance(dt, datetime.datetime):
         if is_naive(dt):
             self.timezone = LocalTimezone(dt)
         else:
             self.timezone = dt.tzinfo

    def __init__(self, obj):
        self.data = obj
        self.timezone = None

        # We only support timezone when formatting datetime objects,
        # not date objects (timezone information not appropriate),
        # or time objects (against established django policy).
        if isinstance(obj, datetime.datetime):
            if is_naive(obj):
                self.timezone = LocalTimezone(obj)
            else:
                self.timezone = obj.tzinfo

 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)

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 b(self):
        "Month, textual, 3 letters, lowercase; e.g. 'jan'"
        return MONTHS_3[self.data.month]

    def d(self):
        "Day of the month, 2 digits with leading zeros; i.e. '01' to '31'"
        return u'%02d' % self.data.day

    def D(self):
        "Day of the week, textual, 3 letters; e.g. 'Fri'"
        return WEEKDAYS_ABBR[self.data.weekday()]

    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 and self.timezone.dst(self.data):
            return u'1'
        else:
            return u'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 calendar.isleap(self.data.year)

    def m(self):
        "Month; i.e. '01' to '12'"
        return u'%02d' % self.data.month

    def M(self):
        "Month, textual, 3 letters; e.g. 'Jan'"
        return MONTHS_3[self.data.month].title()

    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'"
        seconds = self.Z()
        return u"%+03d%02d" % (seconds // 3600, (seconds // 60) % 60)

    def r(self):
        "RFC 2822 formatted date; e.g. 'Thu, 21 Dec 2000 16:01:07 +0200'"
        timestamp = time.mktime(self.data.timetuple())
        return formatdate(timestamp, True)

    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 u'th'
        last = self.data.day % 10
        if last == 1:
            return u'st'
        if last == 2:
            return u'nd'
        if last == 3:
            return u'rd'
        return u'th'

    def t(self):
        "Number of days in the given month; i.e. '28' to '31'"
        return u'%02d' % calendar.monthrange(self.data.year, self.data.month)[1]

    def T(self):
        "Time zone of this machine; e.g. 'EST' or 'MDT'"
        name = self.timezone and self.timezone.tzname(self.data) or None
        if name is None:
            name = self.format('O')
        return unicode(name)

    def U(self):
        "Seconds since the Unix epoch (January 1 1970 00:00:00 GMT)"
        if getattr(self.data, 'tzinfo', None):
            return int(calendar.timegm(self.data.utctimetuple()))
        else:
#.........这里部分代码省略.........

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 = None
        if isinstance(dt, datetime.datetime):
            if is_naive(dt):
                self.timezone = LocalTimezone(dt)
            else:
                self.timezone = dt.tzinfo

    def b(self):
        "Month, textual, 3 letters, lowercase; e.g. 'jan'"
        return MONTHS_3[self.data.month]

    def c(self):
        """
        ISO 8601 Format
        Example : '2008-01-02T10:30:00.000123'
        """
        return self.data.isoformat()

    def d(self):
        "Day of the month, 2 digits with leading zeros; i.e. '01' to '31'"
        return u'%02d' % self.data.day

    def D(self):
        "Day of the week, textual, 3 letters; e.g. 'Fri'"
        return WEEKDAYS_ABBR[self.data.weekday()]

    def e(self):
        "Timezone name if available"
        try:
            if hasattr(self.data, 'tzinfo') and self.data.tzinfo:
                # Have to use tzinfo.tzname and not datetime.tzname
                # because datatime.tzname does not expect Unicode
                return self.data.tzinfo.tzname(self.data) or ""
        except NotImplementedError:
            pass
        return ""

    def E(self):
        "Alternative month names as required by some locales. Proprietary extension."
        return MONTHS_ALT[self.data.month]

    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 and self.timezone.dst(self.data):
            return u'1'
        else:
            return u'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 calendar.isleap(self.data.year)

    def m(self):
        "Month; i.e. '01' to '12'"
        return u'%02d' % self.data.month

    def M(self):
        "Month, textual, 3 letters; e.g. 'Jan'"
        return MONTHS_3[self.data.month].title()

    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):
        "ISO 8601 year number matching the ISO week number (W)"
        return self.data.isocalendar()[0]

    def O(self):
        "Difference to Greenwich time in hours; e.g. '+0200', '-0430'"
        seconds = self.Z()
        sign = '-' if seconds < 0 else '+'
        seconds = abs(seconds)
        return u"%s%02d%02d" % (sign, seconds // 3600, (seconds // 60) % 60)

    def r(self):
        "RFC 2822 formatted date; e.g. 'Thu, 21 Dec 2000 16:01:07 +0200'"
        return self.format('D, j M Y H:i:s O')
#.........这里部分代码省略.........

class TimeFormat(Formatter):
    def __init__(self, obj):
        self.data = obj
        self.timezone = None

        # We only support timezone when formatting datetime objects,
        # not date objects (timezone information not appropriate),
        # or time objects (against established django policy).
        if isinstance(obj, datetime.datetime):
            if is_naive(obj):
                self.timezone = LocalTimezone(obj)
            else:
                self.timezone = obj.tzinfo

    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 e(self):
        """
        Timezone name.

        If timezone information is not available, this method returns
        an empty string.
        """
        if not self.timezone:
            return ""

        try:
            if hasattr(self.data, "tzinfo") and self.data.tzinfo:
                # Have to use tzinfo.tzname and not datetime.tzname
                # because datatime.tzname does not expect Unicode
                return self.data.tzinfo.tzname(self.data) or ""
        except NotImplementedError:
            pass
        return ""

    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 O(self):
        """
        Difference to Greenwich time in hours; e.g. '+0200', '-0430'.

        If timezone information is not available, this method returns
        an empty string.
        """
        if not self.timezone:
            return ""

        seconds = self.Z()
        sign = "-" if seconds < 0 else "+"
        seconds = abs(seconds)
        return "%s%02d%02d" % (sign, seconds // 3600, (seconds // 60) % 60)

    def P(self):
#.........这里部分代码省略.........