def test_set_format(self):
"""
Test basics of setting format attribute.
"""
dt = TimeDelta(86400.0, format='sec')
assert dt.value == 86400.0
assert dt.format == 'sec'
dt.format = 'jd'
assert dt.value == 1.0
assert dt.format == 'jd'
dt.format = 'datetime'
assert dt.value == timedelta(days=1)
assert dt.format == 'datetime'
def test_set_format(self):
"""
Test basics of setting format attribute.
"""
dt = TimeDelta(86400.0, format='sec')
assert dt.value == 86400.0
assert dt.format == 'sec'
dt.format = 'jd'
assert dt.value == 1.0
assert dt.format == 'jd'
dt.format = 'datetime'
assert dt.value == timedelta(days=1)
assert dt.format == 'datetime'
def __getitem__(self, i):
""" Supports indexing of the TimeScale, e.g. ts[0:10:2] """
if isinstance(i, slice):
skip = 1 if i.step is None else i.step
start = 0 if i.start is None else i.start
stop = self.n_step if i.stop is None else i.stop
new_n_step = (stop - start) // skip
new_time_unix = self.val_start + start * self.val_step
new_time_obj = Time(new_time_unix, format='unix')
new_time_obj.format = self.time_format
new_delta_sec = self.val_step * skip
new_delta_obj = TimeDelta(new_delta_sec, format='sec')
new_delta_obj.format = self.time_delta_format
#return self.val_start + self.val_step * np.arange(start, stop, step)
return TimeScale(self.name,
new_time_obj.value,
new_delta_obj.value,
new_n_step,
time_format=new_time_obj.format,
time_delta_format=new_delta_obj.format)
else:
if i < 0 or i > self.n_step:
raise IndexError(
f"Index ({i}) is out of axis bound ({self.n_step})")
t = Time(i * self.val_step + self.val_start, format='unix')
t.format = self.time_format
return t
def test_timedelta_datetime_roundtrip(scale, days, day_frac):
td = TimeDelta(days, day_frac, format="jd", scale=scale)
td.format = "datetime"
assert_almost_equal(td, TimeDelta(td.value, scale=scale), atol=2 * u.us)
def time_delta(self):
t = TimeDelta(self.val_step, format='sec')
t.format = self.time_delta_format
return t