1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416
|
# this file is derived from lunar project.
#
# lunar project:
# Copyright (C) 1988,1989,1991,1992,2001 Fung F. Lee and Ricky Yeung
# Licensed under GPLv2.
#
# Copyright (C) 2008 LI Daobing <lidaobing@gmail.com>
'''
A Chinese Calendar Library in Pure Python
=========================================
Chinese Calendar: http://en.wikipedia.org/wiki/Chinese_calendar
Usage
-----
>>> LunarDate.fromSolarDate(1976, 10, 1)
LunarDate(1976, 8, 8, 1)
>>> LunarDate(1976, 8, 8, 1).toSolarDate()
datetime.date(1976, 10, 1)
>>> LunarDate(1976, 8, 8, 1).year
1976
>>> LunarDate(1976, 8, 8, 1).month
8
>>> LunarDate(1976, 8, 8, 1).day
8
>>> LunarDate(1976, 8, 8, 1).isLeapMonth
True
>>> today = LunarDate.today()
>>> type(today).__name__
'LunarDate'
>>> # support '+' and '-' between datetime.date and datetime.timedelta
>>> ld = LunarDate(1976,8,8)
>>> sd = datetime.date(2008,1,1)
>>> td = datetime.timedelta(days=10)
>>> ld-ld
datetime.timedelta(0)
>>> (ld-sd).days
-11444
>>> ld-td
LunarDate(1976, 7, 27, 0)
>>> (sd-ld).days
11444
>>> ld+td
LunarDate(1976, 8, 18, 0)
>>> td+ld
LunarDate(1976, 8, 18, 0)
>>> ld2 = LunarDate.today()
>>> ld < ld2
True
>>> ld <= ld2
True
>>> ld > ld2
False
>>> ld >= ld2
False
>>> ld == ld2
False
>>> ld != ld2
True
>>> ld == ld
True
>>> LunarDate.today() == LunarDate.today()
True
>>> before_leap_month = LunarDate.fromSolarDate(2088, 5, 17)
>>> before_leap_month.year
2088
>>> before_leap_month.month
4
>>> before_leap_month.day
27
>>> before_leap_month.isLeapMonth
False
>>> leap_month = LunarDate.fromSolarDate(2088, 6, 17)
>>> leap_month.year
2088
>>> leap_month.month
4
>>> leap_month.day
28
>>> leap_month.isLeapMonth
True
>>> after_leap_month = LunarDate.fromSolarDate(2088, 7, 17)
>>> after_leap_month.year
2088
>>> after_leap_month.month
5
>>> after_leap_month.day
29
>>> after_leap_month.isLeapMonth
False
Limits
------
this library can only deal with year from 1900 to 2099 (in chinese calendar).
See also
--------
* lunar: http://packages.qa.debian.org/l/lunar.html,
A converter written in C, this program is derived from it.
* python-lunar: http://code.google.com/p/liblunar/
Another library written in C, including a python binding.
'''
import datetime
__version__ = "0.2.0"
__all__ = ['LunarDate']
class LunarDate(object):
_startDate = datetime.date(1900, 1, 31)
def __init__(self, year, month, day, isLeapMonth=False):
self.year = year
self.month = month
self.day = day
self.isLeapMonth = bool(isLeapMonth)
def __str__(self):
return 'LunarDate(%d, %d, %d, %d)' % (self.year, self.month, self.day, self.isLeapMonth)
__repr__ = __str__
@staticmethod
def fromSolarDate(year, month, day):
'''
>>> LunarDate.fromSolarDate(1900, 1, 31)
LunarDate(1900, 1, 1, 0)
>>> LunarDate.fromSolarDate(2008, 10, 2)
LunarDate(2008, 9, 4, 0)
>>> LunarDate.fromSolarDate(1976, 10, 1)
LunarDate(1976, 8, 8, 1)
>>> LunarDate.fromSolarDate(2033, 10, 23)
LunarDate(2033, 10, 1, 0)
'''
solarDate = datetime.date(year, month, day)
offset = (solarDate - LunarDate._startDate).days
return LunarDate._fromOffset(offset)
def toSolarDate(self):
'''
>>> LunarDate(1900, 1, 1).toSolarDate()
datetime.date(1900, 1, 31)
>>> LunarDate(2008, 9, 4).toSolarDate()
datetime.date(2008, 10, 2)
>>> LunarDate(1976, 8, 8, 1).toSolarDate()
datetime.date(1976, 10, 1)
>>> LunarDate(2004, 1, 30).toSolarDate()
Traceback (most recent call last):
...
ValueError: day out of range
>>> LunarDate(2004, 13, 1).toSolarDate()
Traceback (most recent call last):
...
ValueError: month out of range
>>> LunarDate(2100, 1, 1).toSolarDate()
Traceback (most recent call last):
...
ValueError: year out of range [1900, 2100)
>>>
'''
def _calcDays(yearInfo, month, day, isLeapMonth):
isLeapMonth = int(isLeapMonth)
res = 0
ok = False
for _month, _days, _isLeapMonth in self._enumMonth(yearInfo):
if (_month, _isLeapMonth) == (month, isLeapMonth):
if 1 <= day <= _days:
res += day - 1
return res
else:
raise ValueError("day out of range")
res += _days
raise ValueError("month out of range")
offset = 0
start_year = 1900
end_year = start_year + len(yearInfos)
if start_year < 1900 or self.year >= end_year:
raise ValueError('year out of range [{}, {})'.format(start_year, end_year))
yearIdx = self.year - 1900
for i in range(yearIdx):
offset += yearDays[i]
offset += _calcDays(yearInfos[yearIdx], self.month, self.day, self.isLeapMonth)
return self._startDate + datetime.timedelta(days=offset)
def __sub__(self, other):
if isinstance(other, LunarDate):
return self.toSolarDate() - other.toSolarDate()
elif isinstance(other, datetime.date):
return self.toSolarDate() - other
elif isinstance(other, datetime.timedelta):
res = self.toSolarDate() - other
return LunarDate.fromSolarDate(res.year, res.month, res.day)
raise TypeError
def __rsub__(self, other):
if isinstance(other, datetime.date):
return other - self.toSolarDate()
def __add__(self, other):
if isinstance(other, datetime.timedelta):
res = self.toSolarDate() + other
return LunarDate.fromSolarDate(res.year, res.month, res.day)
raise TypeError
def __radd__(self, other):
return self + other
def __eq__(self, other):
'''
>>> LunarDate.today() == 5
False
'''
if not isinstance(other, LunarDate):
return False
return self - other == datetime.timedelta(0)
def __lt__(self, other):
'''
>>> LunarDate.today() < LunarDate.today()
False
>>> LunarDate.today() < 5
Traceback (most recent call last):
...
TypeError: can't compare LunarDate to int
'''
try:
return self - other < datetime.timedelta(0)
except TypeError:
raise TypeError("can't compare LunarDate to %s" % (type(other).__name__,))
def __le__(self, other):
# needed because the default implementation tries equality first,
# and that does not throw a type error
return self < other or self == other
def __gt__(self, other):
'''
>>> LunarDate.today() > LunarDate.today()
False
>>> LunarDate.today() > 5
Traceback (most recent call last):
...
TypeError: can't compare LunarDate to int
'''
return not self <= other
def __ge__(self, other):
'''
>>> LunarDate.today() >= LunarDate.today()
True
>>> LunarDate.today() >= 5
Traceback (most recent call last):
...
TypeError: can't compare LunarDate to int
'''
return not self < other
@classmethod
def today(cls):
res = datetime.date.today()
return cls.fromSolarDate(res.year, res.month, res.day)
@staticmethod
def _enumMonth(yearInfo):
months = [(i, 0) for i in range(1, 13)]
leapMonth = yearInfo % 16
if leapMonth == 0:
pass
elif leapMonth <= 12:
months.insert(leapMonth, (leapMonth, 1))
else:
raise ValueError("yearInfo %r mod 16 should in [0, 12]" % yearInfo)
for month, isLeapMonth in months:
if isLeapMonth:
days = (yearInfo >> 16) % 2 + 29
else:
days = (yearInfo >> (16 - month)) % 2 + 29
yield month, days, isLeapMonth
@classmethod
def _fromOffset(cls, offset):
def _calcMonthDay(yearInfo, offset):
for month, days, isLeapMonth in cls._enumMonth(yearInfo):
if offset < days:
break
offset -= days
return (month, offset + 1, isLeapMonth)
offset = int(offset)
for idx, yearDay in enumerate(yearDays):
if offset < yearDay:
break
offset -= yearDay
year = 1900 + idx
yearInfo = yearInfos[idx]
month, day, isLeapMonth = _calcMonthDay(yearInfo, offset)
return LunarDate(year, month, day, isLeapMonth)
yearInfos = [
# /* encoding:
# b bbbbbbbbbbbb bbbb
# bit# 1 111111000000 0000
# 6 543210987654 3210
# . ............ ....
# month# 000000000111
# M 123456789012 L
#
# b_j = 1 for long month, b_j = 0 for short month
# L is the leap month of the year if 1<=L<=12; NO leap month if L = 0.
# The leap month (if exists) is long one iff M = 1.
# */
0x04bd8, # /* 1900 */
0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950,# /* 1905 */
0x16554, 0x056a0, 0x09ad0, 0x055d2, 0x04ae0,# /* 1910 */
0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540,# /* 1915 */
0x0d6a0, 0x0ada2, 0x095b0, 0x14977, 0x04970,# /* 1920 */
0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54,# /* 1925 */
0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,# /* 1930 */
0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60,# /* 1935 */
0x186e3, 0x092e0, 0x1c8d7, 0x0c950, 0x0d4a0,# /* 1940 */
0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0,# /* 1945 */
0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0,# /* 1950 */
0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573,# /* 1955 */
0x052d0, 0x0a9a8, 0x0e950, 0x06aa0, 0x0aea6,# /* 1960 */
0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,# /* 1965 */
0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0,# /* 1970 */
0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250,# /* 1975 */
0x0d558, 0x0b540, 0x0b5a0, 0x195a6, 0x095b0,# /* 1980 */
0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50,# /* 1985 */
0x06d40, 0x0af46, 0x0ab60, 0x09570, 0x04af5,# /* 1990 */
0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58,# /* 1995 */
0x05ac0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960,# /* 2000 */
0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0,# /* 2005 */
0x0abb7, 0x025d0, 0x092d0, 0x0cab5, 0x0a950,# /* 2010 */
0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0,# /* 2015 */
0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954,# /* 2020 */
0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6,# /* 2025 */
0x0a4e0, 0x0d260, 0x0ea65, 0x0d530, 0x05aa0,# /* 2030 */
0x076a3, 0x096d0, 0x04afb, 0x04ad0, 0x0a4d0,# /* 2035 */
0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0,# /* 2040 */
0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0,# /* 2045 */
0x0aa50, 0x1b255, 0x06d20, 0x0ada0, 0x14b63,# /* 2050 */
0x09370, 0x049f8, 0x04970, 0x064b0, 0x168a6,# /* 2055 */
0x0ea50, 0x06aa0, 0x1a6c4, 0x0aae0, 0x092e0,# /* 2060 */
0x0d2e3, 0x0c960, 0x0d557, 0x0d4a0, 0x0da50,# /* 2065 */
0x05d55, 0x056a0, 0x0a6d0, 0x055d4, 0x052d0,# /* 2070 */
0x0a9b8, 0x0a950, 0x0b4a0, 0x0b6a6, 0x0ad50,# /* 2075 */
0x055a0, 0x0aba4, 0x0a5b0, 0x052b0, 0x0b273,# /* 2080 */
0x06930, 0x07337, 0x06aa0, 0x0ad50, 0x14b55,# /* 2085 */
0x04b60, 0x0a570, 0x054e4, 0x0d160, 0x0e968,# /* 2090 */
0x0d520, 0x0daa0, 0x16aa6, 0x056d0, 0x04ae0,# /* 2095 */
0x0a9d4, 0x0a2d0, 0x0d150, 0x0f252, # /* 2099 */
]
def yearInfo2yearDay(yearInfo):
'''calculate the days in a lunar year from the lunar year's info
>>> yearInfo2yearDay(0) # no leap month, and every month has 29 days.
348
>>> yearInfo2yearDay(1) # 1 leap month, and every month has 29 days.
377
>>> yearInfo2yearDay((2**12-1)*16) # no leap month, and every month has 30 days.
360
>>> yearInfo2yearDay((2**13-1)*16+1) # 1 leap month, and every month has 30 days.
390
>>> # 1 leap month, and every normal month has 30 days, and leap month has 29 days.
>>> yearInfo2yearDay((2**12-1)*16+1)
389
'''
yearInfo = int(yearInfo)
res = 29 * 12
leap = False
if yearInfo % 16 != 0:
leap = True
res += 29
yearInfo //= 16
for i in range(12 + leap):
if yearInfo % 2 == 1:
res += 1
yearInfo //= 2
return res
yearDays = [yearInfo2yearDay(x) for x in yearInfos]
def day2LunarDate(offset):
offset = int(offset)
res = LunarDate()
for idx, yearDay in enumerate(yearDays):
if offset < yearDay:
break
offset -= yearDay
res.year = 1900 + idx
if __name__ == '__main__':
import doctest
failure_count, test_count = doctest.testmod()
if failure_count > 0:
import sys
sys.exit(1)
|