How to use the cftime.JulianDayFromDate function in cftime
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Unidata / netcdf4-python / test / tst_netcdftime.py View on Github 
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)
# 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'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',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(numpy.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')
dateformat = '%Y-%m-%d %H:%M:%S'
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')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')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')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)
# 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'cftime
Time-handling functionality from netcdf4-python
Package Health Score
88 / 100Popular cftime functions
- cftime.__version__
- cftime._cftime._dateparse
- cftime._cftime.date2num
- cftime._cftime.num2date
- cftime._parse_date
- cftime.date2index
- cftime.date2num
- cftime.DateFromJulianDay
- cftime.datetime
- cftime.Datetime360Day
- cftime.DatetimeAllLeap
- cftime.DatetimeGregorian
- cftime.DatetimeJulian
- cftime.DatetimeNoLeap
- cftime.DatetimeProlepticGregorian
- cftime.JulianDayFromDate
- cftime.num2date
- cftime.real_datetime
- cftime.utime