from datetime import datetime
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import pytest
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from pandas import (
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DatetimeIndex,
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offsets,
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to_datetime,
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)
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import pandas._testing as tm
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from pandas.tseries.holiday import (
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AbstractHolidayCalendar,
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Holiday,
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Timestamp,
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USFederalHolidayCalendar,
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USLaborDay,
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USThanksgivingDay,
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get_calendar,
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)
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@pytest.mark.parametrize(
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"transform", [lambda x: x, lambda x: x.strftime("%Y-%m-%d"), lambda x: Timestamp(x)]
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)
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def test_calendar(transform):
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start_date = datetime(2012, 1, 1)
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end_date = datetime(2012, 12, 31)
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calendar = USFederalHolidayCalendar()
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holidays = calendar.holidays(transform(start_date), transform(end_date))
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expected = [
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datetime(2012, 1, 2),
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datetime(2012, 1, 16),
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datetime(2012, 2, 20),
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datetime(2012, 5, 28),
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datetime(2012, 7, 4),
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datetime(2012, 9, 3),
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datetime(2012, 10, 8),
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datetime(2012, 11, 12),
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datetime(2012, 11, 22),
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datetime(2012, 12, 25),
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]
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assert list(holidays.to_pydatetime()) == expected
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def test_calendar_caching():
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# see gh-9552.
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class TestCalendar(AbstractHolidayCalendar):
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def __init__(self, name=None, rules=None) -> None:
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super().__init__(name=name, rules=rules)
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jan1 = TestCalendar(rules=[Holiday("jan1", year=2015, month=1, day=1)])
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jan2 = TestCalendar(rules=[Holiday("jan2", year=2015, month=1, day=2)])
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# Getting holidays for Jan 1 should not alter results for Jan 2.
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tm.assert_index_equal(jan1.holidays(), DatetimeIndex(["01-Jan-2015"]))
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tm.assert_index_equal(jan2.holidays(), DatetimeIndex(["02-Jan-2015"]))
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def test_calendar_observance_dates():
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# see gh-11477
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us_fed_cal = get_calendar("USFederalHolidayCalendar")
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holidays0 = us_fed_cal.holidays(
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datetime(2015, 7, 3), datetime(2015, 7, 3)
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) # <-- same start and end dates
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holidays1 = us_fed_cal.holidays(
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datetime(2015, 7, 3), datetime(2015, 7, 6)
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) # <-- different start and end dates
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holidays2 = us_fed_cal.holidays(
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datetime(2015, 7, 3), datetime(2015, 7, 3)
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) # <-- same start and end dates
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# These should all produce the same result.
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#
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# In addition, calling with different start and end
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# dates should not alter the output if we call the
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# function again with the same start and end date.
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tm.assert_index_equal(holidays0, holidays1)
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tm.assert_index_equal(holidays0, holidays2)
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def test_rule_from_name():
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us_fed_cal = get_calendar("USFederalHolidayCalendar")
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assert us_fed_cal.rule_from_name("Thanksgiving Day") == USThanksgivingDay
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def test_calendar_2031():
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# See gh-27790
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#
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# Labor Day 2031 is on September 1. Saturday before is August 30.
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# Next working day after August 30 ought to be Tuesday, September 2.
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class testCalendar(AbstractHolidayCalendar):
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rules = [USLaborDay]
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cal = testCalendar()
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workDay = offsets.CustomBusinessDay(calendar=cal)
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Sat_before_Labor_Day_2031 = to_datetime("2031-08-30")
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next_working_day = Sat_before_Labor_Day_2031 + 0 * workDay
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assert next_working_day == to_datetime("2031-09-02")
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def test_no_holidays_calendar():
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# Test for issue #31415
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class NoHolidaysCalendar(AbstractHolidayCalendar):
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pass
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cal = NoHolidaysCalendar()
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holidays = cal.holidays(Timestamp("01-Jan-2020"), Timestamp("01-Jan-2021"))
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empty_index = DatetimeIndex([]) # Type is DatetimeIndex since return_name=False
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tm.assert_index_equal(holidays, empty_index)
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