598 lines
21 KiB
Python
598 lines
21 KiB
Python
import calendar
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from datetime import datetime, timedelta
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import dateutil.tz
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from dateutil.tz import tzutc
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import numpy as np
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import pytest
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import pytz
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from pandas.errors import OutOfBoundsDatetime
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from pandas import Period, Timedelta, Timestamp, compat
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from pandas.tseries import offsets
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class TestTimestampConstructors:
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def test_constructor(self):
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base_str = "2014-07-01 09:00"
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base_dt = datetime(2014, 7, 1, 9)
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base_expected = 1_404_205_200_000_000_000
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# confirm base representation is correct
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assert calendar.timegm(base_dt.timetuple()) * 1_000_000_000 == base_expected
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tests = [
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(base_str, base_dt, base_expected),
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(
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"2014-07-01 10:00",
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datetime(2014, 7, 1, 10),
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base_expected + 3600 * 1_000_000_000,
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),
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(
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"2014-07-01 09:00:00.000008000",
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datetime(2014, 7, 1, 9, 0, 0, 8),
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base_expected + 8000,
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),
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(
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"2014-07-01 09:00:00.000000005",
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Timestamp("2014-07-01 09:00:00.000000005"),
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base_expected + 5,
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),
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]
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timezones = [
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(None, 0),
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("UTC", 0),
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(pytz.utc, 0),
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("Asia/Tokyo", 9),
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("US/Eastern", -4),
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("dateutil/US/Pacific", -7),
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(pytz.FixedOffset(-180), -3),
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(dateutil.tz.tzoffset(None, 18000), 5),
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]
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for date_str, date, expected in tests:
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for result in [Timestamp(date_str), Timestamp(date)]:
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# only with timestring
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assert result.value == expected
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# re-creation shouldn't affect to internal value
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result = Timestamp(result)
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assert result.value == expected
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# with timezone
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for tz, offset in timezones:
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for result in [Timestamp(date_str, tz=tz), Timestamp(date, tz=tz)]:
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expected_tz = expected - offset * 3600 * 1_000_000_000
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assert result.value == expected_tz
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# should preserve tz
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result = Timestamp(result)
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assert result.value == expected_tz
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# should convert to UTC
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if tz is not None:
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result = Timestamp(result).tz_convert("UTC")
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else:
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result = Timestamp(result, tz="UTC")
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expected_utc = expected - offset * 3600 * 1_000_000_000
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assert result.value == expected_utc
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def test_constructor_with_stringoffset(self):
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# GH 7833
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base_str = "2014-07-01 11:00:00+02:00"
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base_dt = datetime(2014, 7, 1, 9)
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base_expected = 1_404_205_200_000_000_000
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# confirm base representation is correct
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assert calendar.timegm(base_dt.timetuple()) * 1_000_000_000 == base_expected
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tests = [
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(base_str, base_expected),
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("2014-07-01 12:00:00+02:00", base_expected + 3600 * 1_000_000_000),
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("2014-07-01 11:00:00.000008000+02:00", base_expected + 8000),
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("2014-07-01 11:00:00.000000005+02:00", base_expected + 5),
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]
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timezones = [
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(None, 0),
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("UTC", 0),
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(pytz.utc, 0),
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("Asia/Tokyo", 9),
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("US/Eastern", -4),
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("dateutil/US/Pacific", -7),
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(pytz.FixedOffset(-180), -3),
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(dateutil.tz.tzoffset(None, 18000), 5),
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]
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for date_str, expected in tests:
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for result in [Timestamp(date_str)]:
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# only with timestring
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assert result.value == expected
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# re-creation shouldn't affect to internal value
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result = Timestamp(result)
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assert result.value == expected
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# with timezone
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for tz, offset in timezones:
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result = Timestamp(date_str, tz=tz)
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expected_tz = expected
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assert result.value == expected_tz
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# should preserve tz
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result = Timestamp(result)
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assert result.value == expected_tz
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# should convert to UTC
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result = Timestamp(result).tz_convert("UTC")
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expected_utc = expected
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assert result.value == expected_utc
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# This should be 2013-11-01 05:00 in UTC
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# converted to Chicago tz
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result = Timestamp("2013-11-01 00:00:00-0500", tz="America/Chicago")
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assert result.value == Timestamp("2013-11-01 05:00").value
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expected = "Timestamp('2013-11-01 00:00:00-0500', tz='America/Chicago')"
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assert repr(result) == expected
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assert result == eval(repr(result))
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# This should be 2013-11-01 05:00 in UTC
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# converted to Tokyo tz (+09:00)
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result = Timestamp("2013-11-01 00:00:00-0500", tz="Asia/Tokyo")
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assert result.value == Timestamp("2013-11-01 05:00").value
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expected = "Timestamp('2013-11-01 14:00:00+0900', tz='Asia/Tokyo')"
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assert repr(result) == expected
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assert result == eval(repr(result))
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# GH11708
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# This should be 2015-11-18 10:00 in UTC
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# converted to Asia/Katmandu
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result = Timestamp("2015-11-18 15:45:00+05:45", tz="Asia/Katmandu")
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assert result.value == Timestamp("2015-11-18 10:00").value
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expected = "Timestamp('2015-11-18 15:45:00+0545', tz='Asia/Katmandu')"
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assert repr(result) == expected
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assert result == eval(repr(result))
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# This should be 2015-11-18 10:00 in UTC
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# converted to Asia/Kolkata
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result = Timestamp("2015-11-18 15:30:00+05:30", tz="Asia/Kolkata")
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assert result.value == Timestamp("2015-11-18 10:00").value
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expected = "Timestamp('2015-11-18 15:30:00+0530', tz='Asia/Kolkata')"
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assert repr(result) == expected
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assert result == eval(repr(result))
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def test_constructor_invalid(self):
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msg = "Cannot convert input"
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with pytest.raises(TypeError, match=msg):
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Timestamp(slice(2))
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msg = "Cannot convert Period"
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with pytest.raises(ValueError, match=msg):
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Timestamp(Period("1000-01-01"))
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def test_constructor_invalid_tz(self):
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# GH#17690
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msg = (
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"Argument 'tzinfo' has incorrect type "
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r"\(expected datetime.tzinfo, got str\)"
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)
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with pytest.raises(TypeError, match=msg):
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Timestamp("2017-10-22", tzinfo="US/Eastern")
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msg = "at most one of"
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with pytest.raises(ValueError, match=msg):
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Timestamp("2017-10-22", tzinfo=pytz.utc, tz="UTC")
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msg = "Invalid frequency:"
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with pytest.raises(ValueError, match=msg):
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# GH#5168
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# case where user tries to pass tz as an arg, not kwarg, gets
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# interpreted as a `freq`
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Timestamp("2012-01-01", "US/Pacific")
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def test_constructor_strptime(self):
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# GH25016
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# Test support for Timestamp.strptime
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fmt = "%Y%m%d-%H%M%S-%f%z"
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ts = "20190129-235348-000001+0000"
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msg = r"Timestamp.strptime\(\) is not implemented"
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with pytest.raises(NotImplementedError, match=msg):
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Timestamp.strptime(ts, fmt)
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def test_constructor_tz_or_tzinfo(self):
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# GH#17943, GH#17690, GH#5168
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stamps = [
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Timestamp(year=2017, month=10, day=22, tz="UTC"),
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Timestamp(year=2017, month=10, day=22, tzinfo=pytz.utc),
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Timestamp(year=2017, month=10, day=22, tz=pytz.utc),
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Timestamp(datetime(2017, 10, 22), tzinfo=pytz.utc),
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Timestamp(datetime(2017, 10, 22), tz="UTC"),
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Timestamp(datetime(2017, 10, 22), tz=pytz.utc),
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]
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assert all(ts == stamps[0] for ts in stamps)
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def test_constructor_positional(self):
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# see gh-10758
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msg = "an integer is required"
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with pytest.raises(TypeError, match=msg):
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Timestamp(2000, 1)
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msg = "month must be in 1..12"
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with pytest.raises(ValueError, match=msg):
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Timestamp(2000, 0, 1)
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with pytest.raises(ValueError, match=msg):
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Timestamp(2000, 13, 1)
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msg = "day is out of range for month"
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with pytest.raises(ValueError, match=msg):
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Timestamp(2000, 1, 0)
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with pytest.raises(ValueError, match=msg):
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Timestamp(2000, 1, 32)
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# see gh-11630
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assert repr(Timestamp(2015, 11, 12)) == repr(Timestamp("20151112"))
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assert repr(Timestamp(2015, 11, 12, 1, 2, 3, 999999)) == repr(
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Timestamp("2015-11-12 01:02:03.999999")
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)
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def test_constructor_keyword(self):
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# GH 10758
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msg = "function missing required argument 'day'|Required argument 'day'"
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with pytest.raises(TypeError, match=msg):
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Timestamp(year=2000, month=1)
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msg = "month must be in 1..12"
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with pytest.raises(ValueError, match=msg):
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Timestamp(year=2000, month=0, day=1)
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with pytest.raises(ValueError, match=msg):
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Timestamp(year=2000, month=13, day=1)
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msg = "day is out of range for month"
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with pytest.raises(ValueError, match=msg):
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Timestamp(year=2000, month=1, day=0)
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with pytest.raises(ValueError, match=msg):
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Timestamp(year=2000, month=1, day=32)
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assert repr(Timestamp(year=2015, month=11, day=12)) == repr(
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Timestamp("20151112")
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)
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assert (
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repr(
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Timestamp(
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year=2015,
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month=11,
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day=12,
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hour=1,
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minute=2,
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second=3,
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microsecond=999999,
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)
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)
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== repr(Timestamp("2015-11-12 01:02:03.999999"))
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)
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def test_constructor_fromordinal(self):
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base = datetime(2000, 1, 1)
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ts = Timestamp.fromordinal(base.toordinal(), freq="D")
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assert base == ts
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assert ts.freq == "D"
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assert base.toordinal() == ts.toordinal()
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ts = Timestamp.fromordinal(base.toordinal(), tz="US/Eastern")
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assert Timestamp("2000-01-01", tz="US/Eastern") == ts
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assert base.toordinal() == ts.toordinal()
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# GH#3042
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dt = datetime(2011, 4, 16, 0, 0)
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ts = Timestamp.fromordinal(dt.toordinal())
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assert ts.to_pydatetime() == dt
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# with a tzinfo
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stamp = Timestamp("2011-4-16", tz="US/Eastern")
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dt_tz = stamp.to_pydatetime()
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ts = Timestamp.fromordinal(dt_tz.toordinal(), tz="US/Eastern")
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assert ts.to_pydatetime() == dt_tz
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@pytest.mark.parametrize(
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"result",
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[
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Timestamp(datetime(2000, 1, 2, 3, 4, 5, 6), nanosecond=1),
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Timestamp(
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year=2000,
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month=1,
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day=2,
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hour=3,
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minute=4,
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second=5,
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microsecond=6,
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nanosecond=1,
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),
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Timestamp(
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year=2000,
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month=1,
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day=2,
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hour=3,
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minute=4,
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second=5,
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microsecond=6,
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nanosecond=1,
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tz="UTC",
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),
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Timestamp(2000, 1, 2, 3, 4, 5, 6, 1, None),
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Timestamp(2000, 1, 2, 3, 4, 5, 6, 1, pytz.UTC),
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],
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)
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def test_constructor_nanosecond(self, result):
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# GH 18898
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expected = Timestamp(datetime(2000, 1, 2, 3, 4, 5, 6), tz=result.tz)
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expected = expected + Timedelta(nanoseconds=1)
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assert result == expected
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@pytest.mark.parametrize("z", ["Z0", "Z00"])
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def test_constructor_invalid_Z0_isostring(self, z):
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# GH 8910
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msg = "could not convert string to Timestamp"
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with pytest.raises(ValueError, match=msg):
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Timestamp(f"2014-11-02 01:00{z}")
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@pytest.mark.parametrize(
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"arg",
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[
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"year",
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"month",
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"day",
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"hour",
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"minute",
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"second",
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"microsecond",
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"nanosecond",
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],
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)
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def test_invalid_date_kwarg_with_string_input(self, arg):
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kwarg = {arg: 1}
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msg = "Cannot pass a date attribute keyword argument"
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with pytest.raises(ValueError, match=msg):
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Timestamp("2010-10-10 12:59:59.999999999", **kwarg)
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def test_out_of_bounds_integer_value(self):
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# GH#26651 check that we raise OutOfBoundsDatetime, not OverflowError
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msg = str(Timestamp.max.value * 2)
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with pytest.raises(OutOfBoundsDatetime, match=msg):
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Timestamp(Timestamp.max.value * 2)
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msg = str(Timestamp.min.value * 2)
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with pytest.raises(OutOfBoundsDatetime, match=msg):
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Timestamp(Timestamp.min.value * 2)
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def test_out_of_bounds_value(self):
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one_us = np.timedelta64(1).astype("timedelta64[us]")
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# By definition we can't go out of bounds in [ns], so we
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# convert the datetime64s to [us] so we can go out of bounds
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min_ts_us = np.datetime64(Timestamp.min).astype("M8[us]")
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max_ts_us = np.datetime64(Timestamp.max).astype("M8[us]")
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# No error for the min/max datetimes
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Timestamp(min_ts_us)
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Timestamp(max_ts_us)
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msg = "Out of bounds"
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# One us less than the minimum is an error
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with pytest.raises(ValueError, match=msg):
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Timestamp(min_ts_us - one_us)
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# One us more than the maximum is an error
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with pytest.raises(ValueError, match=msg):
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Timestamp(max_ts_us + one_us)
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def test_out_of_bounds_string(self):
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msg = "Out of bounds"
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with pytest.raises(ValueError, match=msg):
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Timestamp("1676-01-01")
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with pytest.raises(ValueError, match=msg):
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Timestamp("2263-01-01")
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def test_barely_out_of_bounds(self):
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# GH#19529
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# GH#19382 close enough to bounds that dropping nanos would result
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# in an in-bounds datetime
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msg = "Out of bounds nanosecond timestamp: 2262-04-11 23:47:16"
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with pytest.raises(OutOfBoundsDatetime, match=msg):
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Timestamp("2262-04-11 23:47:16.854775808")
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def test_bounds_with_different_units(self):
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out_of_bounds_dates = ("1677-09-21", "2262-04-12")
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time_units = ("D", "h", "m", "s", "ms", "us")
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for date_string in out_of_bounds_dates:
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for unit in time_units:
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dt64 = np.datetime64(date_string, unit)
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msg = "Out of bounds"
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with pytest.raises(OutOfBoundsDatetime, match=msg):
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Timestamp(dt64)
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in_bounds_dates = ("1677-09-23", "2262-04-11")
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for date_string in in_bounds_dates:
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for unit in time_units:
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dt64 = np.datetime64(date_string, unit)
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Timestamp(dt64)
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def test_min_valid(self):
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# Ensure that Timestamp.min is a valid Timestamp
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Timestamp(Timestamp.min)
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def test_max_valid(self):
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# Ensure that Timestamp.max is a valid Timestamp
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Timestamp(Timestamp.max)
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def test_now(self):
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# GH#9000
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ts_from_string = Timestamp("now")
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ts_from_method = Timestamp.now()
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ts_datetime = datetime.now()
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ts_from_string_tz = Timestamp("now", tz="US/Eastern")
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ts_from_method_tz = Timestamp.now(tz="US/Eastern")
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# Check that the delta between the times is less than 1s (arbitrarily
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# small)
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delta = Timedelta(seconds=1)
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assert abs(ts_from_method - ts_from_string) < delta
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assert abs(ts_datetime - ts_from_method) < delta
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assert abs(ts_from_method_tz - ts_from_string_tz) < delta
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assert (
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abs(
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ts_from_string_tz.tz_localize(None)
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- ts_from_method_tz.tz_localize(None)
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)
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< delta
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)
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def test_today(self):
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ts_from_string = Timestamp("today")
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ts_from_method = Timestamp.today()
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ts_datetime = datetime.today()
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ts_from_string_tz = Timestamp("today", tz="US/Eastern")
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ts_from_method_tz = Timestamp.today(tz="US/Eastern")
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# Check that the delta between the times is less than 1s (arbitrarily
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# small)
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delta = Timedelta(seconds=1)
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assert abs(ts_from_method - ts_from_string) < delta
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assert abs(ts_datetime - ts_from_method) < delta
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assert abs(ts_from_method_tz - ts_from_string_tz) < delta
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assert (
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abs(
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ts_from_string_tz.tz_localize(None)
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- ts_from_method_tz.tz_localize(None)
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)
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< delta
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)
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@pytest.mark.parametrize("tz", [None, pytz.timezone("US/Pacific")])
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def test_disallow_setting_tz(self, tz):
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# GH 3746
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ts = Timestamp("2010")
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msg = "Cannot directly set timezone"
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with pytest.raises(AttributeError, match=msg):
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ts.tz = tz
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@pytest.mark.parametrize("offset", ["+0300", "+0200"])
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def test_construct_timestamp_near_dst(self, offset):
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# GH 20854
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expected = Timestamp(f"2016-10-30 03:00:00{offset}", tz="Europe/Helsinki")
|
|
result = Timestamp(expected).tz_convert("Europe/Helsinki")
|
|
assert result == expected
|
|
|
|
@pytest.mark.parametrize(
|
|
"arg", ["2013/01/01 00:00:00+09:00", "2013-01-01 00:00:00+09:00"]
|
|
)
|
|
def test_construct_with_different_string_format(self, arg):
|
|
# GH 12064
|
|
result = Timestamp(arg)
|
|
expected = Timestamp(datetime(2013, 1, 1), tz=pytz.FixedOffset(540))
|
|
assert result == expected
|
|
|
|
def test_construct_timestamp_preserve_original_frequency(self):
|
|
# GH 22311
|
|
result = Timestamp(Timestamp("2010-08-08", freq="D")).freq
|
|
expected = offsets.Day()
|
|
assert result == expected
|
|
|
|
def test_constructor_invalid_frequency(self):
|
|
# GH 22311
|
|
msg = "Invalid frequency:"
|
|
with pytest.raises(ValueError, match=msg):
|
|
Timestamp("2012-01-01", freq=[])
|
|
|
|
@pytest.mark.parametrize("box", [datetime, Timestamp])
|
|
def test_raise_tz_and_tzinfo_in_datetime_input(self, box):
|
|
# GH 23579
|
|
kwargs = {"year": 2018, "month": 1, "day": 1, "tzinfo": pytz.utc}
|
|
msg = "Cannot pass a datetime or Timestamp"
|
|
with pytest.raises(ValueError, match=msg):
|
|
Timestamp(box(**kwargs), tz="US/Pacific")
|
|
msg = "Cannot pass a datetime or Timestamp"
|
|
with pytest.raises(ValueError, match=msg):
|
|
Timestamp(box(**kwargs), tzinfo=pytz.timezone("US/Pacific"))
|
|
|
|
def test_dont_convert_dateutil_utc_to_pytz_utc(self):
|
|
result = Timestamp(datetime(2018, 1, 1), tz=tzutc())
|
|
expected = Timestamp(datetime(2018, 1, 1)).tz_localize(tzutc())
|
|
assert result == expected
|
|
|
|
def test_constructor_subclassed_datetime(self):
|
|
# GH 25851
|
|
# ensure that subclassed datetime works for
|
|
# Timestamp creation
|
|
class SubDatetime(datetime):
|
|
pass
|
|
|
|
data = SubDatetime(2000, 1, 1)
|
|
result = Timestamp(data)
|
|
expected = Timestamp(2000, 1, 1)
|
|
assert result == expected
|
|
|
|
@pytest.mark.skipif(
|
|
not compat.PY38,
|
|
reason="datetime.fromisocalendar was added in Python version 3.8",
|
|
)
|
|
def test_constructor_fromisocalendar(self):
|
|
# GH 30395
|
|
expected_timestamp = Timestamp("2000-01-03 00:00:00")
|
|
expected_stdlib = datetime.fromisocalendar(2000, 1, 1)
|
|
result = Timestamp.fromisocalendar(2000, 1, 1)
|
|
assert result == expected_timestamp
|
|
assert result == expected_stdlib
|
|
assert isinstance(result, Timestamp)
|
|
|
|
|
|
def test_constructor_ambigous_dst():
|
|
# GH 24329
|
|
# Make sure that calling Timestamp constructor
|
|
# on Timestamp created from ambiguous time
|
|
# doesn't change Timestamp.value
|
|
ts = Timestamp(1382835600000000000, tz="dateutil/Europe/London")
|
|
expected = ts.value
|
|
result = Timestamp(ts).value
|
|
assert result == expected
|
|
|
|
|
|
@pytest.mark.parametrize("epoch", [1552211999999999872, 1552211999999999999])
|
|
def test_constructor_before_dst_switch(epoch):
|
|
# GH 31043
|
|
# Make sure that calling Timestamp constructor
|
|
# on time just before DST switch doesn't lead to
|
|
# nonexistent time or value change
|
|
ts = Timestamp(epoch, tz="dateutil/America/Los_Angeles")
|
|
result = ts.tz.dst(ts)
|
|
expected = timedelta(seconds=0)
|
|
assert Timestamp(ts).value == epoch
|
|
assert result == expected
|
|
|
|
|
|
def test_timestamp_constructor_identity():
|
|
# Test for #30543
|
|
expected = Timestamp("2017-01-01T12")
|
|
result = Timestamp(expected)
|
|
assert result is expected
|
|
|
|
|
|
@pytest.mark.parametrize("kwargs", [{}, {"year": 2020}, {"year": 2020, "month": 1}])
|
|
def test_constructor_missing_keyword(kwargs):
|
|
# GH 31200
|
|
|
|
# The exact error message of datetime() depends on its version
|
|
msg1 = r"function missing required argument '(year|month|day)' \(pos [123]\)"
|
|
msg2 = r"Required argument '(year|month|day)' \(pos [123]\) not found"
|
|
msg = "|".join([msg1, msg2])
|
|
|
|
with pytest.raises(TypeError, match=msg):
|
|
Timestamp(**kwargs)
|