mirror of
https://github.com/Mikaela/Limnoria.git
synced 2024-12-27 05:03:07 +01:00
433 lines
17 KiB
Python
433 lines
17 KiB
Python
"""
|
|
Copyright (c) 2003-2007 Gustavo Niemeyer <gustavo@niemeyer.net>
|
|
|
|
This module offers extensions to the standard python 2.3+
|
|
datetime module.
|
|
"""
|
|
__author__ = "Gustavo Niemeyer <gustavo@niemeyer.net>"
|
|
__license__ = "PSF License"
|
|
|
|
import datetime
|
|
import calendar
|
|
|
|
__all__ = ["relativedelta", "MO", "TU", "WE", "TH", "FR", "SA", "SU"]
|
|
|
|
class weekday(object):
|
|
__slots__ = ["weekday", "n"]
|
|
|
|
def __init__(self, weekday, n=None):
|
|
self.weekday = weekday
|
|
self.n = n
|
|
|
|
def __call__(self, n):
|
|
if n == self.n:
|
|
return self
|
|
else:
|
|
return self.__class__(self.weekday, n)
|
|
|
|
def __eq__(self, other):
|
|
try:
|
|
if self.weekday != other.weekday or self.n != other.n:
|
|
return False
|
|
except AttributeError:
|
|
return False
|
|
return True
|
|
|
|
def __repr__(self):
|
|
s = ("MO", "TU", "WE", "TH", "FR", "SA", "SU")[self.weekday]
|
|
if not self.n:
|
|
return s
|
|
else:
|
|
return "%s(%+d)" % (s, self.n)
|
|
|
|
MO, TU, WE, TH, FR, SA, SU = weekdays = tuple([weekday(x) for x in range(7)])
|
|
|
|
class relativedelta:
|
|
"""
|
|
The relativedelta type is based on the specification of the excelent
|
|
work done by M.-A. Lemburg in his mx.DateTime extension. However,
|
|
notice that this type does *NOT* implement the same algorithm as
|
|
his work. Do *NOT* expect it to behave like mx.DateTime's counterpart.
|
|
|
|
There's two different ways to build a relativedelta instance. The
|
|
first one is passing it two date/datetime classes:
|
|
|
|
relativedelta(datetime1, datetime2)
|
|
|
|
And the other way is to use the following keyword arguments:
|
|
|
|
year, month, day, hour, minute, second, microsecond:
|
|
Absolute information.
|
|
|
|
years, months, weeks, days, hours, minutes, seconds, microseconds:
|
|
Relative information, may be negative.
|
|
|
|
weekday:
|
|
One of the weekday instances (MO, TU, etc). These instances may
|
|
receive a parameter N, specifying the Nth weekday, which could
|
|
be positive or negative (like MO(+1) or MO(-2). Not specifying
|
|
it is the same as specifying +1. You can also use an integer,
|
|
where 0=MO.
|
|
|
|
leapdays:
|
|
Will add given days to the date found, if year is a leap
|
|
year, and the date found is post 28 of february.
|
|
|
|
yearday, nlyearday:
|
|
Set the yearday or the non-leap year day (jump leap days).
|
|
These are converted to day/month/leapdays information.
|
|
|
|
Here is the behavior of operations with relativedelta:
|
|
|
|
1) Calculate the absolute year, using the 'year' argument, or the
|
|
original datetime year, if the argument is not present.
|
|
|
|
2) Add the relative 'years' argument to the absolute year.
|
|
|
|
3) Do steps 1 and 2 for month/months.
|
|
|
|
4) Calculate the absolute day, using the 'day' argument, or the
|
|
original datetime day, if the argument is not present. Then,
|
|
subtract from the day until it fits in the year and month
|
|
found after their operations.
|
|
|
|
5) Add the relative 'days' argument to the absolute day. Notice
|
|
that the 'weeks' argument is multiplied by 7 and added to
|
|
'days'.
|
|
|
|
6) Do steps 1 and 2 for hour/hours, minute/minutes, second/seconds,
|
|
microsecond/microseconds.
|
|
|
|
7) If the 'weekday' argument is present, calculate the weekday,
|
|
with the given (wday, nth) tuple. wday is the index of the
|
|
weekday (0-6, 0=Mon), and nth is the number of weeks to add
|
|
forward or backward, depending on its signal. Notice that if
|
|
the calculated date is already Monday, for example, using
|
|
(0, 1) or (0, -1) won't change the day.
|
|
"""
|
|
|
|
def __init__(self, dt1=None, dt2=None,
|
|
years=0, months=0, days=0, leapdays=0, weeks=0,
|
|
hours=0, minutes=0, seconds=0, microseconds=0,
|
|
year=None, month=None, day=None, weekday=None,
|
|
yearday=None, nlyearday=None,
|
|
hour=None, minute=None, second=None, microsecond=None):
|
|
if dt1 and dt2:
|
|
if not isinstance(dt1, datetime.date) or \
|
|
not isinstance(dt2, datetime.date):
|
|
raise TypeError, "relativedelta only diffs datetime/date"
|
|
if type(dt1) is not type(dt2):
|
|
if not isinstance(dt1, datetime.datetime):
|
|
dt1 = datetime.datetime.fromordinal(dt1.toordinal())
|
|
elif not isinstance(dt2, datetime.datetime):
|
|
dt2 = datetime.datetime.fromordinal(dt2.toordinal())
|
|
self.years = 0
|
|
self.months = 0
|
|
self.days = 0
|
|
self.leapdays = 0
|
|
self.hours = 0
|
|
self.minutes = 0
|
|
self.seconds = 0
|
|
self.microseconds = 0
|
|
self.year = None
|
|
self.month = None
|
|
self.day = None
|
|
self.weekday = None
|
|
self.hour = None
|
|
self.minute = None
|
|
self.second = None
|
|
self.microsecond = None
|
|
self._has_time = 0
|
|
|
|
months = (dt1.year*12+dt1.month)-(dt2.year*12+dt2.month)
|
|
self._set_months(months)
|
|
dtm = self.__radd__(dt2)
|
|
if dt1 < dt2:
|
|
while dt1 > dtm:
|
|
months += 1
|
|
self._set_months(months)
|
|
dtm = self.__radd__(dt2)
|
|
else:
|
|
while dt1 < dtm:
|
|
months -= 1
|
|
self._set_months(months)
|
|
dtm = self.__radd__(dt2)
|
|
delta = dt1 - dtm
|
|
self.seconds = delta.seconds+delta.days*86400
|
|
self.microseconds = delta.microseconds
|
|
else:
|
|
self.years = years
|
|
self.months = months
|
|
self.days = days+weeks*7
|
|
self.leapdays = leapdays
|
|
self.hours = hours
|
|
self.minutes = minutes
|
|
self.seconds = seconds
|
|
self.microseconds = microseconds
|
|
self.year = year
|
|
self.month = month
|
|
self.day = day
|
|
self.hour = hour
|
|
self.minute = minute
|
|
self.second = second
|
|
self.microsecond = microsecond
|
|
|
|
if type(weekday) is int:
|
|
self.weekday = weekdays[weekday]
|
|
else:
|
|
self.weekday = weekday
|
|
|
|
yday = 0
|
|
if nlyearday:
|
|
yday = nlyearday
|
|
elif yearday:
|
|
yday = yearday
|
|
if yearday > 59:
|
|
self.leapdays = -1
|
|
if yday:
|
|
ydayidx = [31,59,90,120,151,181,212,243,273,304,334,366]
|
|
for idx, ydays in enumerate(ydayidx):
|
|
if yday <= ydays:
|
|
self.month = idx+1
|
|
if idx == 0:
|
|
self.day = ydays
|
|
else:
|
|
self.day = yday-ydayidx[idx-1]
|
|
break
|
|
else:
|
|
raise ValueError, "invalid year day (%d)" % yday
|
|
|
|
self._fix()
|
|
|
|
def _fix(self):
|
|
if abs(self.microseconds) > 999999:
|
|
s = self.microseconds//abs(self.microseconds)
|
|
div, mod = divmod(self.microseconds*s, 1000000)
|
|
self.microseconds = mod*s
|
|
self.seconds += div*s
|
|
if abs(self.seconds) > 59:
|
|
s = self.seconds//abs(self.seconds)
|
|
div, mod = divmod(self.seconds*s, 60)
|
|
self.seconds = mod*s
|
|
self.minutes += div*s
|
|
if abs(self.minutes) > 59:
|
|
s = self.minutes//abs(self.minutes)
|
|
div, mod = divmod(self.minutes*s, 60)
|
|
self.minutes = mod*s
|
|
self.hours += div*s
|
|
if abs(self.hours) > 23:
|
|
s = self.hours//abs(self.hours)
|
|
div, mod = divmod(self.hours*s, 24)
|
|
self.hours = mod*s
|
|
self.days += div*s
|
|
if abs(self.months) > 11:
|
|
s = self.months//abs(self.months)
|
|
div, mod = divmod(self.months*s, 12)
|
|
self.months = mod*s
|
|
self.years += div*s
|
|
if (self.hours or self.minutes or self.seconds or self.microseconds or
|
|
self.hour is not None or self.minute is not None or
|
|
self.second is not None or self.microsecond is not None):
|
|
self._has_time = 1
|
|
else:
|
|
self._has_time = 0
|
|
|
|
def _set_months(self, months):
|
|
self.months = months
|
|
if abs(self.months) > 11:
|
|
s = self.months//abs(self.months)
|
|
div, mod = divmod(self.months*s, 12)
|
|
self.months = mod*s
|
|
self.years = div*s
|
|
else:
|
|
self.years = 0
|
|
|
|
def __radd__(self, other):
|
|
if not isinstance(other, datetime.date):
|
|
raise TypeError, "unsupported type for add operation"
|
|
elif self._has_time and not isinstance(other, datetime.datetime):
|
|
other = datetime.datetime.fromordinal(other.toordinal())
|
|
year = (self.year or other.year)+self.years
|
|
month = self.month or other.month
|
|
if self.months:
|
|
assert 1 <= abs(self.months) <= 12
|
|
month += self.months
|
|
if month > 12:
|
|
year += 1
|
|
month -= 12
|
|
elif month < 1:
|
|
year -= 1
|
|
month += 12
|
|
day = min(calendar.monthrange(year, month)[1],
|
|
self.day or other.day)
|
|
repl = {"year": year, "month": month, "day": day}
|
|
for attr in ["hour", "minute", "second", "microsecond"]:
|
|
value = getattr(self, attr)
|
|
if value is not None:
|
|
repl[attr] = value
|
|
days = self.days
|
|
if self.leapdays and month > 2 and calendar.isleap(year):
|
|
days += self.leapdays
|
|
ret = (other.replace(**repl)
|
|
+ datetime.timedelta(days=days,
|
|
hours=self.hours,
|
|
minutes=self.minutes,
|
|
seconds=self.seconds,
|
|
microseconds=self.microseconds))
|
|
if self.weekday:
|
|
weekday, nth = self.weekday.weekday, self.weekday.n or 1
|
|
jumpdays = (abs(nth)-1)*7
|
|
if nth > 0:
|
|
jumpdays += (7-ret.weekday()+weekday)%7
|
|
else:
|
|
jumpdays += (ret.weekday()-weekday)%7
|
|
jumpdays *= -1
|
|
ret += datetime.timedelta(days=jumpdays)
|
|
return ret
|
|
|
|
def __rsub__(self, other):
|
|
return self.__neg__().__radd__(other)
|
|
|
|
def __add__(self, other):
|
|
if not isinstance(other, relativedelta):
|
|
raise TypeError, "unsupported type for add operation"
|
|
return relativedelta(years=other.years+self.years,
|
|
months=other.months+self.months,
|
|
days=other.days+self.days,
|
|
hours=other.hours+self.hours,
|
|
minutes=other.minutes+self.minutes,
|
|
seconds=other.seconds+self.seconds,
|
|
microseconds=other.microseconds+self.microseconds,
|
|
leapdays=other.leapdays or self.leapdays,
|
|
year=other.year or self.year,
|
|
month=other.month or self.month,
|
|
day=other.day or self.day,
|
|
weekday=other.weekday or self.weekday,
|
|
hour=other.hour or self.hour,
|
|
minute=other.minute or self.minute,
|
|
second=other.second or self.second,
|
|
microsecond=other.second or self.microsecond)
|
|
|
|
def __sub__(self, other):
|
|
if not isinstance(other, relativedelta):
|
|
raise TypeError, "unsupported type for sub operation"
|
|
return relativedelta(years=other.years-self.years,
|
|
months=other.months-self.months,
|
|
days=other.days-self.days,
|
|
hours=other.hours-self.hours,
|
|
minutes=other.minutes-self.minutes,
|
|
seconds=other.seconds-self.seconds,
|
|
microseconds=other.microseconds-self.microseconds,
|
|
leapdays=other.leapdays or self.leapdays,
|
|
year=other.year or self.year,
|
|
month=other.month or self.month,
|
|
day=other.day or self.day,
|
|
weekday=other.weekday or self.weekday,
|
|
hour=other.hour or self.hour,
|
|
minute=other.minute or self.minute,
|
|
second=other.second or self.second,
|
|
microsecond=other.second or self.microsecond)
|
|
|
|
def __neg__(self):
|
|
return relativedelta(years=-self.years,
|
|
months=-self.months,
|
|
days=-self.days,
|
|
hours=-self.hours,
|
|
minutes=-self.minutes,
|
|
seconds=-self.seconds,
|
|
microseconds=-self.microseconds,
|
|
leapdays=self.leapdays,
|
|
year=self.year,
|
|
month=self.month,
|
|
day=self.day,
|
|
weekday=self.weekday,
|
|
hour=self.hour,
|
|
minute=self.minute,
|
|
second=self.second,
|
|
microsecond=self.microsecond)
|
|
|
|
def __nonzero__(self):
|
|
return not (not self.years and
|
|
not self.months and
|
|
not self.days and
|
|
not self.hours and
|
|
not self.minutes and
|
|
not self.seconds and
|
|
not self.microseconds and
|
|
not self.leapdays and
|
|
self.year is None and
|
|
self.month is None and
|
|
self.day is None and
|
|
self.weekday is None and
|
|
self.hour is None and
|
|
self.minute is None and
|
|
self.second is None and
|
|
self.microsecond is None)
|
|
|
|
def __mul__(self, other):
|
|
f = float(other)
|
|
return relativedelta(years=self.years*f,
|
|
months=self.months*f,
|
|
days=self.days*f,
|
|
hours=self.hours*f,
|
|
minutes=self.minutes*f,
|
|
seconds=self.seconds*f,
|
|
microseconds=self.microseconds*f,
|
|
leapdays=self.leapdays,
|
|
year=self.year,
|
|
month=self.month,
|
|
day=self.day,
|
|
weekday=self.weekday,
|
|
hour=self.hour,
|
|
minute=self.minute,
|
|
second=self.second,
|
|
microsecond=self.microsecond)
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, relativedelta):
|
|
return False
|
|
if self.weekday or other.weekday:
|
|
if not self.weekday or not other.weekday:
|
|
return False
|
|
if self.weekday.weekday != other.weekday.weekday:
|
|
return False
|
|
n1, n2 = self.weekday.n, other.weekday.n
|
|
if n1 != n2 and not ((not n1 or n1 == 1) and (not n2 or n2 == 1)):
|
|
return False
|
|
return (self.years == other.years and
|
|
self.months == other.months and
|
|
self.days == other.days and
|
|
self.hours == other.hours and
|
|
self.minutes == other.minutes and
|
|
self.seconds == other.seconds and
|
|
self.leapdays == other.leapdays and
|
|
self.year == other.year and
|
|
self.month == other.month and
|
|
self.day == other.day and
|
|
self.hour == other.hour and
|
|
self.minute == other.minute and
|
|
self.second == other.second and
|
|
self.microsecond == other.microsecond)
|
|
|
|
def __ne__(self, other):
|
|
return not self.__eq__(other)
|
|
|
|
def __div__(self, other):
|
|
return self.__mul__(1/float(other))
|
|
|
|
def __repr__(self):
|
|
l = []
|
|
for attr in ["years", "months", "days", "leapdays",
|
|
"hours", "minutes", "seconds", "microseconds"]:
|
|
value = getattr(self, attr)
|
|
if value:
|
|
l.append("%s=%+d" % (attr, value))
|
|
for attr in ["year", "month", "day", "weekday",
|
|
"hour", "minute", "second", "microsecond"]:
|
|
value = getattr(self, attr)
|
|
if value is not None:
|
|
l.append("%s=%s" % (attr, `value`))
|
|
return "%s(%s)" % (self.__class__.__name__, ", ".join(l))
|
|
|
|
# vim:ts=4:sw=4:et
|