-
Notifications
You must be signed in to change notification settings - Fork 40
/
test_cftime.py
1866 lines (1582 loc) · 76.7 KB
/
test_cftime.py
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
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
from __future__ import print_function
import copy
import operator
import sys
import unittest
from collections import namedtuple
from datetime import datetime, timedelta, MINYEAR
import numpy as np
import pytest
from numpy.testing import assert_almost_equal, assert_equal
import cftime
from cftime import datetime as datetimex
from cftime import real_datetime
from cftime import (DateFromJulianDay, Datetime360Day, DatetimeAllLeap,
DatetimeGregorian, DatetimeJulian, DatetimeNoLeap,
DatetimeProlepticGregorian, JulianDayFromDate, _parse_date,
date2index, date2num, num2date, utime, UNIT_CONVERSION_FACTORS)
try:
from datetime import timezone
except ImportError: # python2.7
from datetime import tzinfo
class timezone(tzinfo):
"""
Fixed offset in minutes east from UTC. adapted from
python 2.7 docs FixedOffset
"""
def __init__(self, offset, name):
self.__offset = offset
self.__name = name
def utcoffset(self, dt):
return self.__offset
def tzname(self, dt):
return self.__name
def dst(self, dt):
return timedelta(hours=0)
utc = timezone(timedelta(hours=0), 'UTC')
est = timezone(timedelta(hours=-5), 'UTC')
# test cftime module for netCDF time <--> python datetime conversions.
dtime = namedtuple('dtime', ('values', 'units', 'calendar'))
dateformat = '%Y-%m-%d %H:%M:%S'
calendars=['standard', 'gregorian', 'proleptic_gregorian', 'noleap', 'julian',\
'all_leap', '365_day', '366_day', '360_day']
def adjust_calendar(calendar):
# check for and remove calendar synonyms.
calendar = calendar.lower()
if calendar == 'gregorian' or calendar == 'standard':
return 'gregorian'
elif calendar == 'noleap' or calendar == '365_day':
return 'noleap'
elif calendar == 'all_leap' or calendar == '366_day':
return 'all_leap'
else:
return calendar
class CFTimeVariable(object):
'''dummy "netCDF" variable to hold time info'''
def __init__(self, values, calendar='standard', units=None):
self.values = np.asarray(values)
self.calendar = calendar
self.units = units
def __array__(self):
# np special method that returns a np array.
return self.values[...]
def __getitem__(self, indexers):
return self.values[indexers]
def __repr__(self):
print('units: ', self.units)
print('calendar: ', self.calendar)
print('')
return repr(self.values)
def __str__(self):
return self.__repr__()
def __len__(self):
return len(self.values)
@property
def shape(self):
return self.values.shape
class cftimeTestCase(unittest.TestCase):
def setUp(self):
self.cdftime_mixed = utime('hours since 0001-01-01 00:00:00')
self.cdftime_julian = utime(
'hours since 0001-01-01 00:00:00', calendar='julian')
self.cdftime_mixed_tz = utime('hours since 0001-01-01 00:00:00 -06:00')
self.cdftime_pg = utime('seconds since 0001-01-01 00:00:00',
calendar='proleptic_gregorian')
self.cdftime_noleap = utime(
'days since 1600-02-28 00:00:00', calendar='noleap')
self.cdftime_leap = utime(
'days since 1600-02-29 00:00:00', calendar='all_leap')
self.cdftime_360day = utime(
'days since 1600-02-30 00:00:00', calendar='360_day')
self.cdftime_jul = utime(
'hours since 1000-01-01 00:00:00', calendar='julian')
self.cdftime_iso = utime("seconds since 1970-01-01T00:00:00Z")
self.cdftime_leading_space = utime("days since 850-01-01 00:00:00")
self.cdftime_mixed_capcal = utime('hours since 0001-01-01 00:00:00',
calendar='Standard')
self.cdftime_noleap_capcal = utime(
'days since 1600-02-28 00:00:00', calendar='NOLEAP')
def test_tz_aware(self):
"""testing with timezone"""
self.assertTrue(self.cdftime_mixed.units == 'hours')
d1 = datetime(1582, 10, 4, 23, tzinfo=utc)
t1 = self.cdftime_mixed.date2num(d1)
d2 = datetime(1582, 10, 4, 18, tzinfo=est)
t2 = self.cdftime_mixed.date2num(d2)
assert_almost_equal(t1, 13865687.0)
assert_almost_equal(t2, 13865682.0) # est is 5 hours behind utc
def test_tz_naive(self):
"""testing cftime"""
# test mixed julian/gregorian calendar
# check attributes.
self.assertTrue(self.cdftime_mixed.units == 'hours')
self.assertTrue(
str(self.cdftime_mixed.origin) == '0001-01-01 00:00:00')
self.assertTrue(
self.cdftime_mixed.unit_string == 'hours since 0001-01-01 00:00:00')
self.assertTrue(self.cdftime_mixed.calendar == 'standard')
# check date2num method. (date before switch)
d = datetime(1582, 10, 4, 23)
t1 = self.cdftime_mixed.date2num(d)
assert_almost_equal(t1, 13865687.0)
# check num2date method.
d2 = self.cdftime_mixed.num2date(t1)
self.assertTrue(str(d) == str(d2))
# this is a non-existant date, should raise ValueError.
d = datetime(1582, 10, 5, 0)
self.assertRaises(ValueError, self.cdftime_mixed.date2num, d)
# check date2num/num2date with date after switch.
d = datetime(1582, 10, 15, 0)
t2 = self.cdftime_mixed.date2num(d)
assert_almost_equal(t2, 13865688.0)
d2 = self.cdftime_mixed.num2date(t2)
self.assertTrue(str(d) == str(d2))
# check day of year.
ndayr = d.timetuple()[7]
self.assertTrue(ndayr == 288)
# test using np arrays.
t = np.arange(t2, t2 + 240.0, 12.)
t = np.reshape(t, (4, 5))
d = self.cdftime_mixed.num2date(t)
self.assertTrue(d.shape == t.shape)
d_check = "1582-10-15 00:00:001582-10-15 12:00:001582-10-16 00:00:001582-10-16 12:00:001582-10-17 00:00:001582-10-17 12:00:001582-10-18 00:00:001582-10-18 12:00:001582-10-19 00:00:001582-10-19 12:00:001582-10-20 00:00:001582-10-20 12:00:001582-10-21 00:00:001582-10-21 12:00:001582-10-22 00:00:001582-10-22 12:00:001582-10-23 00:00:001582-10-23 12:00:001582-10-24 00:00:001582-10-24 12:00:00"
d2 = [str(dd) for dd in d.flat]
self.assertTrue(d_check == ''.join(d2))
# test julian calendar with np arrays
d = self.cdftime_julian.num2date(t)
self.assertTrue(d.shape == t.shape)
d_check = "1582-10-05 00:00:001582-10-05 12:00:001582-10-06 00:00:001582-10-06 12:00:001582-10-07 00:00:001582-10-07 12:00:001582-10-08 00:00:001582-10-08 12:00:001582-10-09 00:00:001582-10-09 12:00:001582-10-10 00:00:001582-10-10 12:00:001582-10-11 00:00:001582-10-11 12:00:001582-10-12 00:00:001582-10-12 12:00:001582-10-13 00:00:001582-10-13 12:00:001582-10-14 00:00:001582-10-14 12:00:00"
d2 = [str(dd) for dd in d.flat]
self.assertTrue(d_check == ''.join(d2))
# test proleptic gregorian calendar.
self.assertTrue(self.cdftime_pg.units == 'seconds')
self.assertTrue(str(self.cdftime_pg.origin) == '0001-01-01 00:00:00')
self.assertTrue(
self.cdftime_pg.unit_string == 'seconds since 0001-01-01 00:00:00')
self.assertTrue(self.cdftime_pg.calendar == 'proleptic_gregorian')
# check date2num method.
d = datetime(1990, 5, 5, 2, 17)
t1 = self.cdftime_pg.date2num(d)
self.assertTrue(np.around(t1) == 62777470620.0)
# check num2date method.
d2 = self.cdftime_pg.num2date(t1)
self.assertTrue(d.strftime(dateformat) == d2.strftime(dateformat))
# check day of year.
ndayr = d.timetuple()[7]
self.assertTrue(ndayr == 125)
# check noleap calendar.
# this is a non-existant date, should raise ValueError.
self.assertRaises(
ValueError, utime, 'days since 1600-02-29 00:00:00', calendar='noleap')
self.assertTrue(self.cdftime_noleap.units == 'days')
self.assertTrue(
str(self.cdftime_noleap.origin) == '1600-02-28 00:00:00')
self.assertTrue(
self.cdftime_noleap.unit_string == 'days since 1600-02-28 00:00:00')
self.assertTrue(self.cdftime_noleap.calendar == 'noleap')
assert_almost_equal(
self.cdftime_noleap.date2num(self.cdftime_noleap.origin), 0.0)
# check date2num method.
d1 = datetime(2000, 2, 28)
d2 = datetime(1600, 2, 28)
t1 = self.cdftime_noleap.date2num(d1)
t2 = self.cdftime_noleap.date2num(d2)
assert_almost_equal(t1, 400 * 365.)
assert_almost_equal(t2, 0.)
t12 = self.cdftime_noleap.date2num([d1, d2])
assert_almost_equal(t12, [400 * 365., 0])
# check num2date method.
d2 = self.cdftime_noleap.num2date(t1)
self.assertTrue(str(d1) == str(d2))
# check day of year.
ndayr = d2.timetuple()[7]
self.assertTrue(ndayr == 59)
# non-existant date, should raise ValueError.
date = datetime(2000, 2, 29)
self.assertRaises(ValueError, self.cdftime_noleap.date2num, date)
# check all_leap calendar.
self.assertTrue(self.cdftime_leap.units == 'days')
self.assertTrue(
str(self.cdftime_leap.origin) == '1600-02-29 00:00:00')
self.assertTrue(
self.cdftime_leap.unit_string == 'days since 1600-02-29 00:00:00')
self.assertTrue(self.cdftime_leap.calendar == 'all_leap')
assert_almost_equal(
self.cdftime_leap.date2num(self.cdftime_leap.origin), 0.0)
# check date2num method.
d1 = datetime(2000, 2, 29)
d2 = datetime(1600, 2, 29)
t1 = self.cdftime_leap.date2num(d1)
t2 = self.cdftime_leap.date2num(d2)
assert_almost_equal(t1, 400 * 366.)
assert_almost_equal(t2, 0.)
# check num2date method.
d2 = self.cdftime_leap.num2date(t1)
self.assertTrue(str(d1) == str(d2))
# check day of year.
ndayr = d2.timetuple()[7]
self.assertTrue(ndayr == 60)
# double check date2num,num2date methods.
d = datetime(2000, 12, 31)
t1 = self.cdftime_mixed.date2num(d)
d2 = self.cdftime_mixed.num2date(t1)
self.assertTrue(str(d) == str(d2))
ndayr = d2.timetuple()[7]
self.assertTrue(ndayr == 366)
# check 360_day calendar.
self.assertTrue(self.cdftime_360day.units == 'days')
self.assertTrue(
str(self.cdftime_360day.origin) == '1600-02-30 00:00:00')
self.assertTrue(
self.cdftime_360day.unit_string == 'days since 1600-02-30 00:00:00')
self.assertTrue(self.cdftime_360day.calendar == '360_day')
assert_almost_equal(
self.cdftime_360day.date2num(self.cdftime_360day.origin), 0.0)
# check date2num,num2date methods.
# use datetime from cftime, since this date doesn't
# exist in "normal" calendars.
d = datetimex(2000, 2, 30, calendar='')
t1 = self.cdftime_360day.date2num(d)
assert_almost_equal(t1, 360 * 400.)
d2 = self.cdftime_360day.num2date(t1)
assert_equal(str(d), str(d2))
# check day of year.
d = datetime(2001, 12, 30)
t = self.cdftime_360day.date2num(d)
assert_almost_equal(t, 144660.0)
date = self.cdftime_360day.num2date(t)
self.assertTrue(str(d) == str(date))
ndayr = date.timetuple()[7]
self.assertTrue(ndayr == 360)
# Check fraction
d = datetime(1969, 12, 30, 12)
t = self.cdftime_360day.date2num(d)
date = self.cdftime_360day.num2date(t)
assert_equal(str(d), str(date))
# test proleptic julian calendar.
d = datetime(1858, 11, 17, 12)
t = self.cdftime_jul.date2num(d)
assert_almost_equal(t, 7528932.0)
d1 = datetime(1582, 10, 4, 23)
d2 = datetime(1582, 10, 15, 0)
assert_almost_equal(
self.cdftime_jul.date2num(d1) + 241.0, self.cdftime_jul.date2num(d2))
date = self.cdftime_jul.num2date(t)
self.assertTrue(str(d) == str(date))
# test julian day from date, date from julian day
d = datetime(1858, 11, 17)
mjd = JulianDayFromDate(d)
assert_almost_equal(mjd, 2400000.5)
date = DateFromJulianDay(mjd)
self.assertTrue(str(date) == str(d))
# test iso 8601 units string
d = datetime(1970, 1, 1, 1)
t = self.cdftime_iso.date2num(d)
assert_equal(np.around(t), 3600)
# test fix for issue 75 (seconds hit 60 at end of month,
# day goes out of range).
t = 733499.0
d = num2date(t, units='days since 0001-01-01 00:00:00')
assert_equal(d.strftime(dateformat), '2009-04-01 00:00:00')
# test edge case of issue 75 for numerical problems
for t in (733498.999, 733498.9999, 733498.99999, 733498.999999, 733498.9999999):
d = num2date(t, units='days since 0001-01-01 00:00:00')
t2 = date2num(d, units='days since 0001-01-01 00:00:00')
assert(abs(t2 - t) < 1e-5) # values should be less than second
# Check equality testing
d1 = datetimex(1979, 6, 21, 9, 23, 12, calendar='standard')
d2 = datetime(1979, 6, 21, 9, 23, 12)
assert(d1 == d2)
# check timezone offset
d = datetime(2012, 2, 29, 15)
# mixed_tz is -6 hours from UTC, mixed is UTC so
# difference in elapsed time is -6 hours.
assert(self.cdftime_mixed_tz.date2num(
d) - self.cdftime_mixed.date2num(d) == -6)
# Check comparisons with Python datetime types
# Note that d1 has to use the proleptic Gregorian calendar to
# be comparable to d2: datetime.datetime uses the proleptic
# Gregorian calendar and year 1000 is before the
# Julian/Gregorian transition (1582-10-15).
d1 = num2date(0, 'days since 1000-01-01', 'proleptic_gregorian')
d2 = datetime(2000, 1, 1)
# The date d3 is well after the Julian/Gregorian transition
# and so this Gregorian date can be compared to the proleptic
# Gregorian date d2.
d3 = num2date(0, 'days since 3000-01-01', 'standard')
assert d1 < d2
assert d2 < d3
# check all comparisons
assert d1 != d2
assert d1 <= d2
assert d2 > d1
assert d2 >= d1
# check datetime hash
d1 = datetimex(1995, 1, 1)
d2 = datetime(1995, 1, 1)
d3 = datetimex(2001, 2, 20)
assert hash(d1) == hash(d1)
assert hash(d1) == hash(d2)
assert hash(d1) != hash(d3)
assert hash(d3) == hash(d3)
# check datetime immutability
# using assertRaises as a context manager
# only works with python >= 2.7 (issue #497).
immutability_tests = {"year": 1999,
"month": 6,
"day": 5,
"hour": 10,
"minute": 33,
"second": 45,
"dayofwk": 1,
"dayofyr": 52,
"format": '%Y'}
for name, value in immutability_tests.items():
self.assertRaises(AttributeError, setattr, d1, name, value)
# Check leading white space
self.assertEqual(
str(self.cdftime_leading_space.origin), '0850-01-01 00:00:00')
#issue 330
units = "seconds since 1970-01-01T00:00:00Z"
t = utime(units)
for n in range(10):
assert n == int(round(t.date2num(t.num2date(n))))
#issue 344
units = 'hours since 2013-12-12T12:00:00'
assert(1.0 == date2num(num2date(1.0, units), units))
# test rountrip accuracy
# also tests error found in issue #349
dateref = datetime(2015,2,28,12)
verbose = True # print out max error diagnostics
ntimes = 101
def roundtrip(delta,eps,units):
times1 = date2num(dateref,units,calendar=calendar)
times1 += delta*np.arange(0,ntimes)
dates1 = num2date(times1,units,calendar=calendar)
times2 = date2num(dates1,units,calendar=calendar)
dates2 = num2date(times2,units,calendar=calendar)
err = np.abs(times1 - times2)
assert(np.all(err<eps))
dates1 = [date.strftime(dateformat) for date in dates1]
dates2 = [date.strftime(dateformat) for date in dates2]
assert(dates1==dates2)
return err.max()
for calendar in calendars:
eps = 1.; delta = 1.
units = 'microseconds since 2000-01-30 01:01:01'
maxerr = roundtrip(eps,delta,units)
if verbose:
print('calendar = %s max abs err (microsecs) = %s eps = %s' % \
(calendar,maxerr,eps))
eps = 0.001; delta = 0.001
units = 'milliseconds since 2000-01-30 01:01:01'
maxerr = roundtrip(eps,delta,units)
if verbose:
print('calendar = %s max abs err (millisecs) = %s eps = %s' % \
(calendar,maxerr,eps))
eps = 1.e-5; delta = 0.1
units = 'seconds since 0001-01-30 01:01:01'
maxerr = roundtrip(eps,delta,units)
if verbose:
print('calendar = %s max abs err (secs) = %s eps = %s' % \
(calendar,maxerr,eps))
eps = 1.e-6; delta = 0.01
units = 'minutes since 0001-01-30 01:01:01'
maxerr = roundtrip(eps,delta,units)
if verbose:
print('calendar = %s max abs err (mins) = %s eps = %s' % \
(calendar,maxerr,eps))
eps = 1.e-8; delta = 0.001
units = 'hours since 0001-01-30 01:01:01'
maxerr = roundtrip(eps,delta,units)
if verbose:
print('calendar = %s max abs err (hours) = %s eps = %s' % \
(calendar,maxerr,eps))
eps = 1.e-9; delta = 0.00001
units = 'days since 0001-01-30 01:01:01'
maxerr = roundtrip(eps,delta,units)
if verbose:
print('calendar = %s max abs err (days) = %s eps = %s' % \
(calendar,maxerr,eps))
# issue 353
assert (num2date(0, 'hours since 2000-01-01 0') ==
datetime(2000,1,1,0))
# issue 354
num1 = np.array([[0, 1], [2, 3]])
num2 = np.array([[0, 1], [2, 3]])
dates1 = num2date(num1, 'days since 0001-01-01')
dates2 = num2date(num2, 'days since 2001-01-01')
assert( dates1.shape == (2,2) )
assert( dates2.shape == (2,2) )
num1b = date2num(dates1, 'days since 0001-01-01')
num2b = date2num(dates2, 'days since 2001-01-01')
assert( num1b.shape == (2,2) )
assert( num2b.shape == (2,2) )
assert_almost_equal(num1,num1b)
assert_almost_equal(num2,num2b)
# issue 357 (make sure time zone offset in units done correctly)
# Denver time, 7 hours behind UTC
units = 'hours since 1682-10-15 -07:00 UTC'
# date after gregorian switch, python datetime used
date = datetime(1682,10,15) # assumed UTC
num = date2num(date,units)
# UTC is 7 hours ahead of units, so num should be -7
assert (num == -7)
assert (num2date(num, units) == date)
units = 'hours since 1482-10-15 -07:00 UTC'
# date before gregorian switch, cftime datetime used
date = datetime(1482,10,15)
num = date2num(date,units)
date2 = num2date(num, units)
assert (num == -7)
assert (date2.year == date.year)
assert (date2.month == date.month)
assert (date2.day == date.day)
assert (date2.hour == date.hour)
assert (date2.minute == date.minute)
assert (date2.second == date.second)
# issue 362: case insensitive calendars
self.assertTrue(self.cdftime_mixed_capcal.calendar == 'standard')
self.assertTrue(self.cdftime_noleap_capcal.calendar == 'noleap')
d = datetime(2015, 3, 4, 12, 18, 30)
units = 'days since 0001-01-01'
for cap_cal, low_cal in (('STANDARD', 'standard'),
('NoLeap', 'noleap'),
('Gregorian', 'gregorian'),
('ALL_LEAP', 'all_leap')):
d1 = date2num(d, units, cap_cal)
d2 = date2num(d, units, low_cal)
self.assertEqual(d1, d2)
self.assertEqual(num2date(d1, units, cap_cal),
num2date(d1, units, low_cal))
# issue 415
t = datetimex(2001, 12, 1, 2, 3, 4)
self.assertEqual(t, copy.deepcopy(t))
# issue 442
units = "days since 0000-01-01 00:00:00"
# this should fail (year zero not allowed with real-world calendars)
try:
date2num(datetime(1, 1, 1), units, calendar='standard')
except ValueError:
pass
# this should not fail (year zero allowed in 'fake' calendars)
t = date2num(datetime(1, 1, 1), units, calendar='360_day')
self.assertAlmostEqual(t,360)
d = num2date(t, units, calendar='360_day')
self.assertEqual(d, Datetime360Day(1,1,1))
d = num2date(0, units, calendar='360_day')
self.assertEqual(d, Datetime360Day(0,1,1))
# issue 685: wrong time zone conversion
# 'The following times all refer to the same moment: "18:30Z", "22:30+04", "1130-0700", and "15:00-03:30'
# (https://en.wikipedia.org/w/index.php?title=ISO_8601&oldid=787811367#Time_offsets_from_UTC)
# test num2date
utc_date = datetime(2000,1,1,18,30)
for units in ("hours since 2000-01-01 22:30+04:00", "hours since 2000-01-01 11:30-07:00", "hours since 2000-01-01 15:00-03:30"):
d = num2date(0, units, calendar="standard")
#self.assertEqual(d, utc_date)
# tolerance of 1.e-3 secs
assert(np.abs((d-utc_date).total_seconds()) < 1.e-3)
# also test with negative values to cover 2nd code path
d = num2date(-1, units, calendar="standard")
self.assertEqual(d, utc_date - timedelta(hours=1))
n = date2num(utc_date, units, calendar="standard")
# n should always be 0 as all units refer to the same point in time
self.assertEqual(n, 0)
# explicitly test 2nd code path for date2num
units = "hours since 2000-01-01 22:30+04:00"
n = date2num(utc_date, units, calendar="julian")
# n should always be 0 as all units refer to the same point in time
assert_almost_equal(n, 0)
# list around missing dates in Gregorian calendar
# scalar
units = 'days since 0001-01-01 12:00:00'
t1 = date2num(datetime(1582, 10, 4), units, calendar='gregorian')
t2 = date2num(datetime(1582, 10, 15), units, calendar='gregorian')
self.assertEqual(t1+1, t2)
# list
t1, t2 = date2num([datetime(1582, 10, 4), datetime(1582, 10, 15)], units, calendar='gregorian')
self.assertEqual(t1+1, t2)
t1, t2 = date2num([datetime(1582, 10, 4), datetime(1582, 10, 15)], units, calendar='standard')
self.assertEqual(t1+1, t2)
# this should fail: days missing in Gregorian calendar
try:
t1, t2, t3 = date2num([datetime(1582, 10, 4), datetime(1582, 10, 10), datetime(1582, 10, 15)], units, calendar='standard')
except ValueError:
pass
# test fix for issue #596 - julian day calculations wrong for negative years,
# caused incorrect rountrip num2date(date2num(date)) roundtrip for dates with year
# < 0.
u = utime("seconds since 1-1-1",calendar='julian')
date1 = datetimex(-1, 1, 1)
date2 = u.num2date(u.date2num(date1))
assert (date2.year == date1.year)
assert (date2.month == date1.month)
assert (date2.day == date1.day)
assert (date2.hour == date1.hour)
assert (date2.minute == date1.minute)
assert (date2.second == date1.second)
assert_almost_equal(JulianDayFromDate(date1), 1721057.5)
# issue 596 - negative years fail in utime.num2date
u = utime("seconds since 1-1-1", "proleptic_gregorian")
d = u.num2date(u.date2num(datetimex(-1, 1, 1)))
assert (d.year == -1)
assert (d.month == 1)
assert (d.day == 1)
assert (d.hour == 0)
# test fix for issue #659 (proper treatment of negative time values)
units = 'days since 1800-01-01 00:00:0.0'
d = num2date(-657073, units, calendar='standard')
assert (d.year == 1)
assert (d.month == 1)
assert (d.day == 1)
assert (d.hour == 0)
# cftime issue #134
d = num2date(-657071, units, calendar='proleptic_gregorian',
only_use_cftime_datetimes=False,only_use_python_datetimes=True)
assert(d==datetime(1,1,1,0))
self.assertRaises(ValueError, num2date, \
-657072, units, calendar='proleptic_gregorian',
only_use_cftime_datetimes=False,only_use_python_datetimes=True)
# issue 685: wrong time zone conversion
# 'The following times all refer to the same moment: "18:30Z", "22:30+04", "1130-0700", and "15:00-03:30'
# (https://en.wikipedia.org/w/index.php?title=ISO_8601&oldid=787811367#Time_offsets_from_UTC)
# test num2date
utc_date = datetime(2000,1,1,18,30)
for units in ("hours since 2000-01-01 22:30+04:00", "hours since 2000-01-01 11:30-07:00", "hours since 2000-01-01 15:00-03:30"):
d = num2date(0, units, calendar="standard")
assert(np.abs((d-utc_date).total_seconds()) < 1.e-3)
# also test with negative values to cover 2nd code path
d = num2date(-1, units, calendar="standard")
assert(np.abs((d - \
(utc_date-timedelta(hours=1))).total_seconds()) < 1.e-3)
n = date2num(utc_date, units, calendar="standard")
# n should always be 0 as all units refer to the same point in time
self.assertEqual(n, 0)
# explicitly test 2nd code path for date2num
units = "hours since 2000-01-01 22:30+04:00"
n = date2num(utc_date, units, calendar="julian")
# n should always be 0 as all units refer to the same point in time
assert_almost_equal(n, 0)
# cftime issue #49
d = DateFromJulianDay(2450022.5, "standard")
assert (d.year == 1995)
assert (d.month == 11)
assert (d.day == 1)
assert (d.hour == 0)
assert (d.minute == 0)
assert (d.second == 0)
# cftime issue #52
d = DateFromJulianDay(1684958.5,calendar='gregorian')
assert (d.year == -100)
assert (d.month == 3)
assert (d.day == 2)
assert (d.hour == 0)
assert (d.minute == 0)
assert (d.second == 0)
d = DateFromJulianDay(1684958.5,calendar='standard')
assert (d.year == -100)
assert (d.month == 3)
assert (d.day == 2)
assert (d.hour == 0)
assert (d.minute == 0)
assert (d.second == 0)
# test dayofwk, dayofyr attribute setting (cftime issue #13)
d1 = DatetimeGregorian(2020,2,29)
d2 = real_datetime(2020,2,29)
assert (d1.dayofwk == d2.dayofwk == 5)
assert (d1.dayofyr == d2.dayofyr == 60)
d1 = DatetimeGregorian(2020,2,29,23,59,59)
d2 = real_datetime(2020,2,29,23,59,59)
assert (d1.dayofwk == d2.dayofwk == 5)
assert (d1.dayofyr == d2.dayofyr == 60)
d1 = DatetimeGregorian(2020,2,28,23,59,59)
d2 = real_datetime(2020,2,28,23,59,59)
assert (d1.dayofwk == d2.dayofwk == 4)
assert (d1.dayofyr == d2.dayofyr == 59)
d1 = DatetimeGregorian(1700,1,1)
d2 = real_datetime(1700,1,1)
assert (d1.dayofwk == d2.dayofwk == 4)
assert (d1.dayofyr == d2.dayofyr == 1)
# last day of Julian Calendar (Thursday)
d1 = DatetimeJulian(1582, 10, 4, 12)
d2 = DatetimeGregorian(1582, 10, 4, 12)
assert (d1.dayofwk == d2.dayofwk == 3)
assert (d1.dayofyr == d2.dayofyr == 277)
# Monday in proleptic gregorian calendar
d1 = DatetimeProlepticGregorian(1582, 10, 4, 12)
d2 = real_datetime(1582,10,4,12)
assert (d1.dayofwk == d2.dayofwk == 0)
assert (d1.dayofyr == d2.dayofyr == 277)
# issue 173: Return the default values of dayofwk and dayofyr
# when calendar is ''
d1 = datetimex(1582, 10, 4, 12, calendar='')
assert (d1.dayofwk == d1.dayofyr == -1)
d1 = datetimex(2020, 5, 20, calendar='')
assert (d1.dayofwk == d1.dayofyr == -1)
d1 = datetimex(2020, 5, 20, dayofwk=-2, dayofyr=-3, calendar='')
assert (d1.dayofwk == -2)
assert (d1.dayofyr == -3)
d1 = datetimex(2020, 5, 20, dayofwk=8, dayofyr=9, calendar='')
assert (d1.dayofwk == 8)
assert (d1.dayofyr == 9)
# issue 71: negative reference years
# https://coastwatch.pfeg.noaa.gov/erddap/convert/time.html
# gives 2446433 (365 days more - is it counting year 0?)
# however http://aa.usno.navy.mil/data/docs/JulianDate.php gives
# 2446068, which agrees with us
units = "days since -4713-01-01T00:00:00Z"
t = date2num(datetime(1985,1,2), units, calendar="standard")
assert_almost_equal(t, 2446068)
# issue #68: allow months since for 360_day calendar
d = num2date(1, 'months since 0000-01-01 00:00:00', calendar='360_day')
self.assertEqual(d, Datetime360Day(0,2,1))
t = date2num(d, 'months since 0000-01-01 00:00:00', calendar='360_day')
self.assertEqual(t, 1)
# check that exception is raised if 'months since' used with
# anything but the 360_day calendar.
self.assertRaises(ValueError, num2date, \
1, 'months since 01-01-01',calendar='standard')
self.assertRaises(ValueError, utime, \
'months since 01-01-01', calendar='standard')
# issue #78 - extra digits due to roundoff
assert(cftime.date2num(cftime.datetime(1, 12, 1, 0, 0, 0, 0, -1, 1), units='days since 01-01-01',calendar='noleap') == 334.0)
assert(cftime.date2num(cftime.num2date(1.0,units='days since 01-01-01',calendar='noleap'),units='days since 01-01-01',calendar='noleap') == 1.0)
assert(cftime.date2num(cftime.DatetimeNoLeap(1980, 1, 1, 0, 0, 0, 0, 6, 1),'days since 1970-01-01','noleap') == 3650.0)
# issue #126
d = cftime.DatetimeProlepticGregorian(1, 1, 1)
assert(cftime.date2num(d, 'days since 0001-01-01',\
'proleptic_gregorian') == 0.0)
# issue #140 (fractional seconds in reference date)
d = datetime.strptime('2018-01-23 09:27:10.950000',"%Y-%m-%d %H:%M:%S.%f")
units = 'seconds since 2018-01-23 09:31:42.94'
assert(cftime.date2num(d, units) == -271.99)
# issue 143 - same answer for arrays vs scalars.
units = 'seconds since 1970-01-01 00:00:00'
times_in = [1261440000.0, 1261440001.0, 1261440002.0, 1261440003.0,
1261440004.0, 1261440005.0]
times_out1 = cftime.num2date(times_in, units)
times_out2 = []
for time_in in times_in:
times_out2.append(cftime.num2date(time_in, units))
dates1 = [str(d) for d in times_out1]
dates2 = [str(d) for d in times_out2]
assert(dates1 == dates2)
# issue #143 formatting of microseconds
d = cftime.num2date(1261440000.015625,units)
# on windows only 100 ms precision
assert(str(d)[0:24] == '2009-12-22 00:00:00.0156')
# issue #152 add isoformat()
assert(d.isoformat()[0:24] == '2009-12-22T00:00:00.0156')
assert(d.isoformat(sep=' ')[0:24] == '2009-12-22 00:00:00.0156')
assert(d.isoformat(sep=' ',timespec='milliseconds') == '2009-12-22 00:00:00.015')
assert(d.isoformat(sep=' ',timespec='seconds') == '2009-12-22 00:00:00')
assert(d.isoformat(sep=' ',timespec='minutes') == '2009-12-22 00:00')
assert(d.isoformat(sep=' ',timespec='hours') == '2009-12-22 00')
# issue #165: make sure python datetime returned
d=num2date(0,units="seconds since 2000-01-01 00:00:00",only_use_cftime_datetimes=False)
assert isinstance(d, datetime)
# issue #169: cftime.datetime has no calendar attribute, causing dayofwk,dayofyr methods
# to fail.
c = cftime.datetime(*cftime._parse_date('7480-01-01 00:00:00'),calendar='standard')
assert(c.strftime() == '7480-01-01 00:00:00')
# issue #175: masked values not treated properly in num2date
times = np.ma.masked_array([-3956.7499999995343,-999999999999],mask=[False,True])
units='days since 1858-11-17 00:00:00'
dates = num2date(times, units=units, calendar='standard',\
only_use_cftime_datetimes=False, only_use_python_datetimes=True)
test = dates == np.ma.masked_array([datetime(1848, 1, 17, 6, 0, 0, 40), None],mask=[0,1])
assert(test.all())
dates = num2date(times, units=units, calendar='standard')
assert(str(dates)=="[cftime.DatetimeGregorian(1848, 1, 17, 6, 0, 0, 40) --]")
# check that time range of 200,000 + years can be represented accurately
calendar='standard'
_MAX_INT64 = np.iinfo("int64").max
refdate = DatetimeGregorian(292277,10,24,0,0,1)
for unit in ['microseconds','milliseconds','seconds']:
units = '%s since 01-01-01' % unit
time = 292471*365*86400*(1000000//int(UNIT_CONVERSION_FACTORS[unit])) + 1000000//int(UNIT_CONVERSION_FACTORS[unit])
date = num2date(time,units,calendar=calendar)
assert(date == refdate)
# check round-trip
time2 = date2num(date,units,calendar=calendar)
date2 = num2date(time2,units,calendar=calendar)
# windows doesn't have a longdouble type (it defaults to float64)
if np.finfo(np.longdouble).precision == 18:
assert(date2 == refdate)
# microsecond roundtrip accuracy preserved over time ranges of 286 years
# (float64 can only represent integers exactly up to 2**53-1)
refdate=DatetimeGregorian(286,6,3,23,47,34,740992)
for unit in ['microseconds','milliseconds','seconds','hours','days']:
units = '%s since 01-01-01' % unit
time = (2**53 - 1)*(1/UNIT_CONVERSION_FACTORS[unit]) + 1/UNIT_CONVERSION_FACTORS[unit]
date = num2date(time,units,calendar=calendar)
assert(date == refdate)
# check round-trip
time2 = date2num(date,units,calendar=calendar)
date2 = num2date(time2,units,calendar=calendar)
assert(date2 == refdate)
# issue #185: date2num should work the numpy scalar array of dates (1.2.0 regression)
dates = np.array(datetime(2010, 2, 2, 0, 0))
assert (date2num(dates, units="hours since 2010-02-01 00:00:00") == 24.)
# issue #187 - roundtrip near second boundary
dt1 = datetime(1810, 4, 24, 16, 15, 10)
units = 'days since -4713-01-01 12:00'
dt2 = num2date(date2num(dt1, units), units)
assert(dt1 == dt2)
# issue #189 - leap years calculated incorrectly for negative years in proleptic_gregorian calendar
dt1 = datetime(2020, 4, 24, 16, 15, 10)
units = 'days since -4713-01-01 12:00'
cal = 'proleptic_gregorian'
dt2 = num2date(date2num(dt1, units, cal), units, cal)
assert(dt1 == dt2)
# issue #198 - cftime.datetime creates calendar specific datetimes that
# support addition/subtraction of timedeltas.
for cal in calendars:
dt = cftime.datetime(2020, 1, 1, calendar=cal)
dt += timedelta(hours=1)
assert(str(dt) == '2020-01-01 01:00:00')
class TestDate2index(unittest.TestCase):
class TestTime:
"""Fake a netCDF time variable."""
def __init__(self, start, n, step, units, calendar='standard'):
"""Create an object that fakes a netCDF time variable.
Internally, this object has a _data array attribute whose values
corresponds to dates in the given units and calendar. `start`, `n`
and `step` define the starting date, the length of the array and
the distance between each date (in units).
"""
self.units = units
self.calendar = calendar
t0 = date2num(start, units, calendar)
self._data = (t0 + np.arange(n) * step).astype('float')
self.dtype = np.float
def __getitem__(self, item):
return self._data[item]
def __len__(self):
return len(self._data)
def shape():
def fget(self):
return self._data.shape
return locals()
shape = property(**shape())
def setUp(self):
self.standardtime = self.TestTime(datetime(1950, 1, 1), 366, 24,
'hours since 1900-01-01', 'standard')
self.time_vars = {}
self.time_vars['time'] = CFTimeVariable(
values=self.standardtime,
units='hours since 1900-01-01')
self.first_timestamp = datetime(2000, 1, 1)
units = 'days since 1901-01-01'
self.time_vars['time2'] = CFTimeVariable(
values=date2num([self.first_timestamp], units),
units=units)
ntimes = 21
units = "seconds since 1970-01-01 00:00:00"
date = datetime(2037, 1, 1, 0)
dates = [date]
for ndate in range(ntimes-1):
date += (ndate+1)*timedelta(hours=1)
dates.append(date)
self.time_vars['time3'] = CFTimeVariable(
values=date2num(dates, units),
units=units)
def test_tz_aware(self):
"""implicit test of date2num"""
dutc = datetime(1950, 2, 1, 0, tzinfo=utc)
t1 = date2index(dutc, self.standardtime)
assert_equal(t1, 31)
dest = datetime(1950, 1, 31, 19, tzinfo=est)
t2 = date2index(dest, self.standardtime)
assert_equal(t2, 31)
def test_simple(self):
t = date2index(datetime(1950, 2, 1), self.standardtime)
assert_equal(t, 31)
def test_singletime(self):
# issue 215 test (date2index with time variable length == 1)
time2 = self.time_vars['time2']
result_index = date2index(self.first_timestamp, time2, select="exact")
assert_equal(result_index, 0)
def test_list(self):
t = date2index(
[datetime(1950, 2, 1), datetime(1950, 2, 3)], self.standardtime)
assert_equal(t, [31, 33])
def test_nonuniform(self):
"""Check that the fallback mechanism works. """
nutime = self.TestTime(datetime(1950, 1, 1), 366, 24,
'hours since 1900-01-01', 'standard')
# Let's remove the second entry, so that the computed stride is not
# representative and the bisection method is needed.
nutime._data = nutime._data[np.r_[0, slice(2, 200)]]
t = date2index(datetime(1950, 2, 1), nutime)
assert_equal(t, 30)
t = date2index([datetime(1950, 2, 1), datetime(1950, 2, 3)], nutime)
assert_equal(t, [30, 32])
def test_failure(self):
nutime = self.TestTime(datetime(1950, 1, 1), 366, 24,
'hours since 1900-01-01', 'standard')
try:
t = date2index(datetime(1949, 2, 1), nutime)
except ValueError:
pass
else:
raise ValueError('This test should have failed.')
def test_select_dummy(self):
nutime = self.TestTime(datetime(1950, 1, 1), 366, 24,
'hours since 1400-01-01', 'standard')
dates = [datetime(1950, 1, 2, 6), datetime(
1950, 1, 3), datetime(1950, 1, 3, 18)]
t = date2index(dates, nutime, select='before')
assert_equal(t, [1, 2, 2])
t = date2index(dates, nutime, select='after')
assert_equal(t, [2, 2, 3])
t = date2index(dates, nutime, select='nearest')
assert_equal(t, [1, 2, 3])
def test_select_nc(self):
nutime = self.time_vars['time']
dates = [datetime(1950, 1, 2, 6), datetime(
1950, 1, 3), datetime(1950, 1, 3, 18)]
t = date2index(dates, nutime, select='before')
assert_equal(t, [1, 2, 2])
t = date2index(dates, nutime, select='after')
assert_equal(t, [2, 2, 3])
t = date2index(dates, nutime, select='nearest')
assert_equal(t, [1, 2, 3])
# Test dates outside the support with select
t = date2index(datetime(1949, 12, 1), nutime, select='nearest')
assert_equal(t, 0)
t = date2index(datetime(1978, 1, 1), nutime, select='nearest')
assert_equal(t, 365)
# Test dates outside the support with before
self.assertRaises(
ValueError, date2index, datetime(1949, 12, 1), nutime, select='before')
t = date2index(datetime(1978, 1, 1), nutime, select='before')
assert_equal(t, 365)
# Test dates outside the support with after
t = date2index(datetime(1949, 12, 1), nutime, select='after')
assert_equal(t, 0)
self.assertRaises(
ValueError, date2index, datetime(1978, 1, 1), nutime, select='after')
# test microsecond and millisecond units
unix_epoch = "milliseconds since 1970-01-01T00:00:00Z"
d = datetime(2038, 1, 19, 3, 14, 7)
millisecs = int(
date2num(d, unix_epoch, calendar='proleptic_gregorian'))
assert_equal(millisecs, (2 ** 32 / 2 - 1) * 1000)
unix_epoch = "microseconds since 1970-01-01T00:00:00Z"
microsecs = int(date2num(d, unix_epoch))
assert_equal(microsecs, (2 ** 32 / 2 - 1) * 1000000)
# test microsecond accuracy in date2num/num2date roundtrip
# note: microsecond accuracy lost for time intervals greater
# than about 270 years.
units = 'microseconds since 1776-07-04 00:00:00-12:00'
dates = [datetime(1962, 10, 27, 6, 1, 30, 9001),
datetime(1993, 11, 21, 12, 5, 25, 999),
datetime(1995, 11, 25, 18, 7, 59, 999999)]
times2 = date2num(dates, units)
dates2 = num2date(times2, units)
datediff = abs(dates-dates2)
for diff in datediff:
assert(diff.microseconds < 100) # tolerance of 100 ms
def test_issue444(self):
# make sure integer overflow not causing error in
# calculation of nearest index when sum of adjacent
# time values won't fit in 32 bits.
query_time = datetime(2037, 1, 3, 21, 12)
index = date2index(query_time, self.time_vars['time3'],
select='nearest')
assert(index == 11)
class issue584TestCase(unittest.TestCase):
"""Regression tests for issue #584."""
converters = None
def setUp(self):
self.converters = {"360_day": utime("days since 1-1-1", "360_day"),
"noleap": utime("days since 1-1-1", "365_day")}
def test_roundtrip(self):
"Test roundtrip conversion (num2date <-> date2num) using 360_day and 365_day calendars."
for datetime_class in [Datetime360Day, DatetimeNoLeap]:
# Pick a date and time outside of the range of the Julian calendar.
date = datetime_class(-5000, 1, 1, 12)
converter = self.converters[date.calendar]
self.assertEqual(date, converter.num2date(converter.date2num(date)))