def to_duration(self):
"""Convert to a Duration."""
date_time_unit, multiplier = self.KEYS[self.unit]
amount = self.amount
if self.sign == self.SIGN_DEFAULT: # negative
amount = -amount
return Duration(**{date_time_unit: multiplier * amount})
def to_duration(self):
"""Convert to a Duration."""
KEYS = {"W": ("days", 7),
"D": ("days", 1),
"H": ("hours", 1),
"M": ("minutes", 1)}
date_time_unit, multiplier = KEYS[self.unit]
amount = self.amount
if self.sign == self.SIGN_DEFAULT: # negative
amount = -amount
return Duration(**{date_time_unit: multiplier * amount})
def get_inferred_child(self, string):
"""Return an instance with 'string' amounts of my non-zero units."""
interval = interval_parse(self.value)
amount_per_unit = int(string)
unit_amounts = {}
for attribute in ["years", "months", "weeks", "days",
"hours", "minutes", "seconds"]:
if getattr(interval, attribute):
unit_amounts[attribute] = amount_per_unit
interval = Duration(**unit_amounts)
return ISO8601Interval(str(interval))
def date_shift(self, time_point=None, offset=None):
"""Return a date string with an offset.
time_point -- A time point or time point string.
Otherwise, use current time.
offset -- If specified, it should be a string containing the offset
that has the format "[+/-]nU[nU...]" where "n" is an
integer, and U is a unit matching a key in self.UNITS.
"""
if time_point is None:
time_point = self.date_parse()[0]
# Offset
if offset:
sign = "+"
if offset.startswith("-") or offset.startswith("+"):
sign = offset[0]
offset = offset[1:]
if offset.startswith("P"):
# Parse and apply.
try:
duration = self.duration_parser.parse(offset)
except ValueError:
raise OffsetValueError(offset)
if sign == "-":
time_point -= duration
else:
time_point += duration
else:
# Backwards compatibility for e.g. "-1h"
if not self.is_offset(offset):
raise OffsetValueError(offset)
for num, unit in self.REC_OFFSET_FIND.findall(offset.lower()):
num = int(num)
if sign == "-":
num = -num
key = self.UNITS[unit]
time_point += Duration(**{key: num})
return time_point
def get_seconds_as_interval_string(seconds):
"""Convert a number of seconds into an ISO 8601 duration string."""
return str(Duration(seconds=seconds, standardize=True))
def _do_test_dates(self, my_date):
"""Performs a series of tests against a given date.
This method does some time consuming operations, which are not IO
bound, so this method is a good candidate to be run concurrently.
:param my_date: a date to be tested
:type my_date: datetime.datetime
"""
ctrl_data = my_date.isocalendar()
test_date = TimePoint(year=my_date.year,
month_of_year=my_date.month,
day_of_month=my_date.day)
test_week_date = test_date.to_week_date()
test_data = test_week_date.get_week_date()
self.assertEqual(test_data, ctrl_data)
ctrl_data = (my_date.year, my_date.month, my_date.day)
test_data = test_week_date.get_calendar_date()
self.assertEqual(test_data, ctrl_data)
ctrl_data = my_date.toordinal()
year, day_of_year = test_date.get_ordinal_date()
test_data = day_of_year
test_data += get_days_since_1_ad(year - 1)
self.assertEqual(test_data, ctrl_data)
for attribute, attr_max in test_duration_attributes:
kwargs = {attribute: random.randrange(0, attr_max)}
ctrl_data = my_date + datetime.timedelta(**kwargs)
ctrl_data = ctrl_data.year, ctrl_data.month, ctrl_data.day
test_data = ((test_date + Duration(**kwargs)).get_calendar_date())
self.assertEqual(test_data, ctrl_data)
ctrl_data = my_date - datetime.timedelta(**kwargs)
ctrl_data = ctrl_data.year, ctrl_data.month, ctrl_data.day
# TBD: the subtraction is quite slow. Much slower than other
# operations. Could be related to the fact it converts the value
# in kwargs to negative multiplying by -1 (i.e. from __sub__ to
# __mul__), and also adds it to the date (i.e. __add__).
# Profiling the tests, the __sub__ operation used in the next
# line will appear amongst the top of time consuming operations.
test_data = ((test_date - Duration(**kwargs)).get_calendar_date())
self.assertEqual(test_data, ctrl_data)
kwargs = {}
for attribute, attr_max in test_duration_attributes:
kwargs[attribute] = random.randrange(0, attr_max)
test_date_minus = test_date - Duration(**kwargs)
test_data = test_date - test_date_minus
ctrl_data = Duration(**kwargs)
self.assertEqual(test_data, ctrl_data)
test_data = test_date_minus + (test_date - test_date_minus)
ctrl_data = test_date
self.assertEqual(test_data, ctrl_data)
test_data = (test_date_minus + Duration(**kwargs))
ctrl_data = test_date
self.assertEqual(test_data, ctrl_data)
ctrl_data = (my_date + datetime.timedelta(minutes=450) +
datetime.timedelta(hours=5) -
datetime.timedelta(seconds=500, weeks=5))
ctrl_data = [(ctrl_data.year, ctrl_data.month, ctrl_data.day),
(ctrl_data.hour, ctrl_data.minute, ctrl_data.second)]
test_data = (test_date + Duration(minutes=450) + Duration(hours=5) -
Duration(weeks=5, seconds=500))
test_data = [
test_data.get_calendar_date(),
test_data.get_hour_minute_second()
]
self.assertEqual(test_data, ctrl_data)
def __str__(self):
return str(Duration(seconds=self, standardize=True))
def get_seconds_as_interval_string(seconds):
"""Convert a number of seconds into an ISO 8601 duration string."""
from isodatetime.data import Duration
return str(Duration(seconds=seconds, standardize=True))
