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Diffstat (limited to 'creactistore/_templates/lib/isodate/duration.py')
| -rw-r--r-- | creactistore/_templates/lib/isodate/duration.py | 261 |
1 files changed, 0 insertions, 261 deletions
diff --git a/creactistore/_templates/lib/isodate/duration.py b/creactistore/_templates/lib/isodate/duration.py deleted file mode 100644 index fa501cd..0000000 --- a/creactistore/_templates/lib/isodate/duration.py +++ /dev/null @@ -1,261 +0,0 @@ -############################################################################## -# Copyright 2009, Gerhard Weis -# All rights reserved. -# -# Redistribution and use in source and binary forms, with or without -# modification, are permitted provided that the following conditions are met: -# -# * Redistributions of source code must retain the above copyright notice, -# this list of conditions and the following disclaimer. -# * Redistributions in binary form must reproduce the above copyright notice, -# this list of conditions and the following disclaimer in the documentation -# and/or other materials provided with the distribution. -# * Neither the name of the authors nor the names of its contributors -# may be used to endorse or promote products derived from this software -# without specific prior written permission. -# -# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -# CONTRACT, STRICT LIABILITY, OR TORT -############################################################################## -''' -This module defines a Duration class. - -The class Duration allows to define durations in years and months and can be -used as limited replacement for timedelta objects. -''' -from datetime import date, datetime, timedelta - - -def fquotmod(val, low, high): - ''' - A divmod function with boundaries. - ''' - div, mod = divmod(val - low, high - low) - mod += low - return int(div), mod - - -def max_days_in_month(year, month): - ''' - Determines the number of days of a specific month in a specific year. - ''' - if month in (1, 3, 5, 7, 8, 10, 12): - return 31 - if month in (4, 6, 9, 11): - return 30 - if ((year % 400) == 0) or ((year % 100) != 0) and ((year % 4) == 0): - return 29 - return 28 - - -class Duration(object): - ''' - A class which represents a duration. - - The difference to datetime.timedelta is, that this class handles also - differences given in years and months. - A Duration treats differences given in year, months separately from all - other components. - - A Duration can be used almost like any timedelta object, however there - are some restrictions: - * It is not really possible to compare Durations, because it is unclear, - whether a duration of 1 year is bigger than 365 days or not. - * Equality is only tested between the two (year, month vs. timedelta) - basic components. - - A Duration can also be converted into a datetime object, but this requires - a start date or an end date. - - The algorithm to add a duration to a date is defined at - http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes - ''' - - def __init__(self, days=0, seconds=0, microseconds=0, milliseconds=0, - minutes=0, hours=0, weeks=0, months=0, years=0): - ''' - Initialise this Duration instance with the given parameters. - ''' - self.months = months - self.years = years - self.tdelta = timedelta(days, seconds, microseconds, milliseconds, - minutes, hours, weeks) - - def __getattr__(self, name): - ''' - Provide direct access to attributes of included timedelta instance. - ''' - return getattr(self.tdelta, name) - - def __str__(self): - ''' - Return a string representation of this duration similar to timedelta. - ''' - params = [] - if self.years: - params.append('%d years' % self.years) - if self.months: - params.append('%d months' % self.months) - params.append(str(self.tdelta)) - return ', '.join(params) - - def __repr__(self): - ''' - Return a string suitable for repr(x) calls. - ''' - return "%s.%s(%d, %d, %d, years=%d, months=%d)" % ( - self.__class__.__module__, self.__class__.__name__, - self.tdelta.days, self.tdelta.seconds, - self.tdelta.microseconds, self.years, self.months) - - def __neg__(self): - """ - A simple unary minus. - - Returns a new Duration instance with all it's negated. - """ - negduration = Duration(years=-self.years, months=-self.months) - negduration.tdelta = -self.tdelta - return negduration - - def __add__(self, other): - ''' - Durations can be added with Duration, timedelta, date and datetime - objects. - ''' - if isinstance(other, timedelta): - newduration = Duration(years=self.years, months=self.months) - newduration.tdelta = self.tdelta + other - return newduration - if isinstance(other, Duration): - newduration = Duration(years=self.years + other.years, - months=self.months + other.months) - newduration.tdelta = self.tdelta + other.tdelta - return newduration - if isinstance(other, (date, datetime)): - newmonth = other.month + self.months - carry, newmonth = fquotmod(newmonth, 1, 13) - newyear = other.year + self.years + carry - maxdays = max_days_in_month(newyear, newmonth) - if other.day > maxdays: - newday = maxdays - else: - newday = other.day - newdt = other.replace(year=newyear, month=newmonth, day=newday) - return self.tdelta + newdt - raise TypeError('unsupported operand type(s) for +: %s and %s' % - (self.__class__, other.__class__)) - - def __radd__(self, other): - ''' - Add durations to timedelta, date and datetime objects. - ''' - if isinstance(other, timedelta): - newduration = Duration(years=self.years, months=self.months) - newduration.tdelta = self.tdelta + other - return newduration - if isinstance(other, (date, datetime)): - newmonth = other.month + self.months - carry, newmonth = fquotmod(newmonth, 1, 13) - newyear = other.year + self.years + carry - maxdays = max_days_in_month(newyear, newmonth) - if other.day > maxdays: - newday = maxdays - else: - newday = other.day - newdt = other.replace(year=newyear, month=newmonth, day=newday) - return newdt + self.tdelta - raise TypeError('unsupported operand type(s) for +: %s and %s' % - (other.__class__, self.__class__)) - - def __sub__(self, other): - ''' - It is possible to subtract Duration and timedelta objects from Duration - objects. - ''' - if isinstance(other, Duration): - newduration = Duration(years=self.years - other.years, - months=self.months - other.months) - newduration.tdelta = self.tdelta - other.tdelta - return newduration - if isinstance(other, timedelta): - newduration = Duration(years=self.years, months=self.months) - newduration.tdelta = self.tdelta - other - return newduration - raise TypeError('unsupported operand type(s) for -: %s and %s' % - (self.__class__, other.__class__)) - - def __rsub__(self, other): - ''' - It is possible to subtract Duration objecs from date, datetime and - timedelta objects. - ''' - #print '__rsub__:', self, other - if isinstance(other, (date, datetime)): - newmonth = other.month - self.months - carry, newmonth = fquotmod(newmonth, 1, 13) - newyear = other.year - self.years + carry - maxdays = max_days_in_month(newyear, newmonth) - if other.day > maxdays: - newday = maxdays - else: - newday = other.day - newdt = other.replace(year=newyear, month=newmonth, day=newday) - return newdt - self.tdelta - if isinstance(other, timedelta): - tmpdur = Duration() - tmpdur.tdelta = other - return tmpdur - self - raise TypeError('unsupported operand type(s) for -: %s and %s' % - (other.__class__, self.__class__)) - - def __eq__(self, other): - ''' - If the years, month part and the timedelta part are both equal, then - the two Durations are considered equal. - ''' - if (isinstance(other, timedelta) and - self.years == 0 and self.months == 0): - return self.tdelta == other - if not isinstance(other, Duration): - return NotImplemented - if ((self.years * 12 + self.months) == - (other.years * 12 + other.months) and self.tdelta == other.tdelta): - return True - return False - - def __ne__(self, other): - ''' - If the years, month part or the timedelta part is not equal, then - the two Durations are considered not equal. - ''' - if isinstance(other, timedelta) and self.years == 0 and self.months == 0: - return self.tdelta != other - if not isinstance(other, Duration): - return NotImplemented - if ((self.years * 12 + self.months) != - (other.years * 12 + other.months) or self.tdelta != other.tdelta): - return True - return False - - def todatetime(self, start=None, end=None): - ''' - Convert this duration into a timedelta object. - - This method requires a start datetime or end datetimem, but raises - an exception if both are given. - ''' - if start is None and end is None: - raise ValueError("start or end required") - if start is not None and end is not None: - raise ValueError("only start or end allowed") - if start is not None: - return (start + self) - start - return end - (end - self) |