566 lines
19 KiB
Python
566 lines
19 KiB
Python
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""" test the scalar Timedelta """
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from datetime import timedelta
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import numpy as np
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import pytest
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from pandas._libs.tslibs import NaT, iNaT
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import pandas as pd
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from pandas import Timedelta, TimedeltaIndex, offsets, to_timedelta
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import pandas._testing as tm
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class TestTimedeltaUnaryOps:
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def test_unary_ops(self):
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td = Timedelta(10, unit="d")
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# __neg__, __pos__
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assert -td == Timedelta(-10, unit="d")
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assert -td == Timedelta("-10d")
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assert +td == Timedelta(10, unit="d")
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# __abs__, __abs__(__neg__)
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assert abs(td) == td
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assert abs(-td) == td
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assert abs(-td) == Timedelta("10d")
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class TestTimedeltas:
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@pytest.mark.parametrize(
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"unit, value, expected",
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[
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("us", 9.999, 9999),
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("ms", 9.999999, 9999999),
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("s", 9.999999999, 9999999999),
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],
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)
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def test_rounding_on_int_unit_construction(self, unit, value, expected):
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# GH 12690
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result = Timedelta(value, unit=unit)
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assert result.value == expected
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result = Timedelta(str(value) + unit)
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assert result.value == expected
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def test_total_seconds_scalar(self):
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# see gh-10939
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rng = Timedelta("1 days, 10:11:12.100123456")
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expt = 1 * 86400 + 10 * 3600 + 11 * 60 + 12 + 100123456.0 / 1e9
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tm.assert_almost_equal(rng.total_seconds(), expt)
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rng = Timedelta(np.nan)
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assert np.isnan(rng.total_seconds())
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def test_conversion(self):
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for td in [Timedelta(10, unit="d"), Timedelta("1 days, 10:11:12.012345")]:
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pydt = td.to_pytimedelta()
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assert td == Timedelta(pydt)
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assert td == pydt
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assert isinstance(pydt, timedelta) and not isinstance(pydt, Timedelta)
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assert td == np.timedelta64(td.value, "ns")
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td64 = td.to_timedelta64()
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assert td64 == np.timedelta64(td.value, "ns")
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assert td == td64
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assert isinstance(td64, np.timedelta64)
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# this is NOT equal and cannot be roundtripped (because of the nanos)
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td = Timedelta("1 days, 10:11:12.012345678")
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assert td != td.to_pytimedelta()
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def test_fields(self):
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def check(value):
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# that we are int
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assert isinstance(value, int)
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# compat to datetime.timedelta
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rng = to_timedelta("1 days, 10:11:12")
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assert rng.days == 1
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assert rng.seconds == 10 * 3600 + 11 * 60 + 12
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assert rng.microseconds == 0
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assert rng.nanoseconds == 0
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msg = "'Timedelta' object has no attribute '{}'"
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with pytest.raises(AttributeError, match=msg.format("hours")):
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rng.hours
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with pytest.raises(AttributeError, match=msg.format("minutes")):
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rng.minutes
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with pytest.raises(AttributeError, match=msg.format("milliseconds")):
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rng.milliseconds
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# GH 10050
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check(rng.days)
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check(rng.seconds)
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check(rng.microseconds)
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check(rng.nanoseconds)
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td = Timedelta("-1 days, 10:11:12")
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assert abs(td) == Timedelta("13:48:48")
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assert str(td) == "-1 days +10:11:12"
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assert -td == Timedelta("0 days 13:48:48")
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assert -Timedelta("-1 days, 10:11:12").value == 49728000000000
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assert Timedelta("-1 days, 10:11:12").value == -49728000000000
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rng = to_timedelta("-1 days, 10:11:12.100123456")
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assert rng.days == -1
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assert rng.seconds == 10 * 3600 + 11 * 60 + 12
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assert rng.microseconds == 100 * 1000 + 123
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assert rng.nanoseconds == 456
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msg = "'Timedelta' object has no attribute '{}'"
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with pytest.raises(AttributeError, match=msg.format("hours")):
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rng.hours
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with pytest.raises(AttributeError, match=msg.format("minutes")):
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rng.minutes
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with pytest.raises(AttributeError, match=msg.format("milliseconds")):
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rng.milliseconds
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# components
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tup = to_timedelta(-1, "us").components
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assert tup.days == -1
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assert tup.hours == 23
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assert tup.minutes == 59
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assert tup.seconds == 59
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assert tup.milliseconds == 999
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assert tup.microseconds == 999
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assert tup.nanoseconds == 0
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# GH 10050
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check(tup.days)
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check(tup.hours)
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check(tup.minutes)
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check(tup.seconds)
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check(tup.milliseconds)
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check(tup.microseconds)
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check(tup.nanoseconds)
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tup = Timedelta("-1 days 1 us").components
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assert tup.days == -2
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assert tup.hours == 23
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assert tup.minutes == 59
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assert tup.seconds == 59
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assert tup.milliseconds == 999
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assert tup.microseconds == 999
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assert tup.nanoseconds == 0
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def test_iso_conversion(self):
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# GH #21877
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expected = Timedelta(1, unit="s")
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assert to_timedelta("P0DT0H0M1S") == expected
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def test_nat_converters(self):
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result = to_timedelta("nat").to_numpy()
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assert result.dtype.kind == "M"
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assert result.astype("int64") == iNaT
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result = to_timedelta("nan").to_numpy()
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assert result.dtype.kind == "M"
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assert result.astype("int64") == iNaT
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@pytest.mark.parametrize(
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"unit, np_unit",
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[(value, "W") for value in ["W", "w"]]
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+ [(value, "D") for value in ["D", "d", "days", "day", "Days", "Day"]]
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+ [
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(value, "m")
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for value in [
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"m",
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"minute",
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"min",
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"minutes",
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"t",
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"Minute",
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"Min",
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"Minutes",
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"T",
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]
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]
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+ [
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(value, "s")
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for value in [
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"s",
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"seconds",
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"sec",
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"second",
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"S",
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"Seconds",
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"Sec",
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"Second",
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]
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]
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+ [
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(value, "ms")
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for value in [
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"ms",
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"milliseconds",
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"millisecond",
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"milli",
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"millis",
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"l",
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"MS",
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"Milliseconds",
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"Millisecond",
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"Milli",
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"Millis",
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"L",
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]
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]
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+ [
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(value, "us")
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for value in [
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"us",
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"microseconds",
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"microsecond",
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"micro",
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"micros",
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"u",
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"US",
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"Microseconds",
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"Microsecond",
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"Micro",
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"Micros",
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"U",
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]
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]
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+ [
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(value, "ns")
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for value in [
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"ns",
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"nanoseconds",
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"nanosecond",
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"nano",
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"nanos",
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"n",
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"NS",
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"Nanoseconds",
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"Nanosecond",
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"Nano",
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"Nanos",
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"N",
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]
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],
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)
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@pytest.mark.parametrize("wrapper", [np.array, list, pd.Index])
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def test_unit_parser(self, unit, np_unit, wrapper):
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# validate all units, GH 6855, GH 21762
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# array-likes
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expected = TimedeltaIndex(
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[np.timedelta64(i, np_unit) for i in np.arange(5).tolist()]
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)
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result = to_timedelta(wrapper(range(5)), unit=unit)
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tm.assert_index_equal(result, expected)
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result = TimedeltaIndex(wrapper(range(5)), unit=unit)
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tm.assert_index_equal(result, expected)
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str_repr = [f"{x}{unit}" for x in np.arange(5)]
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result = to_timedelta(wrapper(str_repr))
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tm.assert_index_equal(result, expected)
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result = to_timedelta(wrapper(str_repr))
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tm.assert_index_equal(result, expected)
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# scalar
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expected = Timedelta(np.timedelta64(2, np_unit).astype("timedelta64[ns]"))
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result = to_timedelta(2, unit=unit)
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assert result == expected
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result = Timedelta(2, unit=unit)
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assert result == expected
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result = to_timedelta(f"2{unit}")
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assert result == expected
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result = Timedelta(f"2{unit}")
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assert result == expected
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@pytest.mark.parametrize("unit", ["Y", "y", "M"])
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def test_unit_m_y_raises(self, unit):
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msg = "Units 'M', 'Y', and 'y' are no longer supported"
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with pytest.raises(ValueError, match=msg):
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Timedelta(10, unit)
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with pytest.raises(ValueError, match=msg):
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to_timedelta(10, unit)
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with pytest.raises(ValueError, match=msg):
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to_timedelta([1, 2], unit)
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def test_numeric_conversions(self):
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assert Timedelta(0) == np.timedelta64(0, "ns")
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assert Timedelta(10) == np.timedelta64(10, "ns")
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assert Timedelta(10, unit="ns") == np.timedelta64(10, "ns")
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assert Timedelta(10, unit="us") == np.timedelta64(10, "us")
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assert Timedelta(10, unit="ms") == np.timedelta64(10, "ms")
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assert Timedelta(10, unit="s") == np.timedelta64(10, "s")
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assert Timedelta(10, unit="d") == np.timedelta64(10, "D")
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def test_timedelta_conversions(self):
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assert Timedelta(timedelta(seconds=1)) == np.timedelta64(1, "s").astype(
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"m8[ns]"
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)
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assert Timedelta(timedelta(microseconds=1)) == np.timedelta64(1, "us").astype(
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"m8[ns]"
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)
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assert Timedelta(timedelta(days=1)) == np.timedelta64(1, "D").astype("m8[ns]")
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def test_to_numpy_alias(self):
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# GH 24653: alias .to_numpy() for scalars
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td = Timedelta("10m7s")
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assert td.to_timedelta64() == td.to_numpy()
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@pytest.mark.parametrize(
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"freq,s1,s2",
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[
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# This first case has s1, s2 being the same as t1,t2 below
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(
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"N",
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Timedelta("1 days 02:34:56.789123456"),
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Timedelta("-1 days 02:34:56.789123456"),
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),
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(
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"U",
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Timedelta("1 days 02:34:56.789123000"),
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Timedelta("-1 days 02:34:56.789123000"),
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),
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(
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"L",
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Timedelta("1 days 02:34:56.789000000"),
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Timedelta("-1 days 02:34:56.789000000"),
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),
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("S", Timedelta("1 days 02:34:57"), Timedelta("-1 days 02:34:57")),
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("2S", Timedelta("1 days 02:34:56"), Timedelta("-1 days 02:34:56")),
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("5S", Timedelta("1 days 02:34:55"), Timedelta("-1 days 02:34:55")),
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("T", Timedelta("1 days 02:35:00"), Timedelta("-1 days 02:35:00")),
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("12T", Timedelta("1 days 02:36:00"), Timedelta("-1 days 02:36:00")),
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("H", Timedelta("1 days 03:00:00"), Timedelta("-1 days 03:00:00")),
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("d", Timedelta("1 days"), Timedelta("-1 days")),
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],
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)
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def test_round(self, freq, s1, s2):
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t1 = Timedelta("1 days 02:34:56.789123456")
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t2 = Timedelta("-1 days 02:34:56.789123456")
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r1 = t1.round(freq)
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assert r1 == s1
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r2 = t2.round(freq)
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assert r2 == s2
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def test_round_invalid(self):
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t1 = Timedelta("1 days 02:34:56.789123456")
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for freq, msg in [
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("Y", "<YearEnd: month=12> is a non-fixed frequency"),
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("M", "<MonthEnd> is a non-fixed frequency"),
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("foobar", "Invalid frequency: foobar"),
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]:
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with pytest.raises(ValueError, match=msg):
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t1.round(freq)
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def test_contains(self):
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# Checking for any NaT-like objects
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# GH 13603
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||
|
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td = to_timedelta(range(5), unit="d") + offsets.Hour(1)
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||
|
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for v in [NaT, None, float("nan"), np.nan]:
|
||
|
|
assert not (v in td)
|
||
|
|
|
||
|
|
td = to_timedelta([NaT])
|
||
|
|
for v in [NaT, None, float("nan"), np.nan]:
|
||
|
|
assert v in td
|
||
|
|
|
||
|
|
def test_identity(self):
|
||
|
|
|
||
|
|
td = Timedelta(10, unit="d")
|
||
|
|
assert isinstance(td, Timedelta)
|
||
|
|
assert isinstance(td, timedelta)
|
||
|
|
|
||
|
|
def test_short_format_converters(self):
|
||
|
|
def conv(v):
|
||
|
|
return v.astype("m8[ns]")
|
||
|
|
|
||
|
|
assert Timedelta("10") == np.timedelta64(10, "ns")
|
||
|
|
assert Timedelta("10ns") == np.timedelta64(10, "ns")
|
||
|
|
assert Timedelta("100") == np.timedelta64(100, "ns")
|
||
|
|
assert Timedelta("100ns") == np.timedelta64(100, "ns")
|
||
|
|
|
||
|
|
assert Timedelta("1000") == np.timedelta64(1000, "ns")
|
||
|
|
assert Timedelta("1000ns") == np.timedelta64(1000, "ns")
|
||
|
|
assert Timedelta("1000NS") == np.timedelta64(1000, "ns")
|
||
|
|
|
||
|
|
assert Timedelta("10us") == np.timedelta64(10000, "ns")
|
||
|
|
assert Timedelta("100us") == np.timedelta64(100000, "ns")
|
||
|
|
assert Timedelta("1000us") == np.timedelta64(1000000, "ns")
|
||
|
|
assert Timedelta("1000Us") == np.timedelta64(1000000, "ns")
|
||
|
|
assert Timedelta("1000uS") == np.timedelta64(1000000, "ns")
|
||
|
|
|
||
|
|
assert Timedelta("1ms") == np.timedelta64(1000000, "ns")
|
||
|
|
assert Timedelta("10ms") == np.timedelta64(10000000, "ns")
|
||
|
|
assert Timedelta("100ms") == np.timedelta64(100000000, "ns")
|
||
|
|
assert Timedelta("1000ms") == np.timedelta64(1000000000, "ns")
|
||
|
|
|
||
|
|
assert Timedelta("-1s") == -np.timedelta64(1000000000, "ns")
|
||
|
|
assert Timedelta("1s") == np.timedelta64(1000000000, "ns")
|
||
|
|
assert Timedelta("10s") == np.timedelta64(10000000000, "ns")
|
||
|
|
assert Timedelta("100s") == np.timedelta64(100000000000, "ns")
|
||
|
|
assert Timedelta("1000s") == np.timedelta64(1000000000000, "ns")
|
||
|
|
|
||
|
|
assert Timedelta("1d") == conv(np.timedelta64(1, "D"))
|
||
|
|
assert Timedelta("-1d") == -conv(np.timedelta64(1, "D"))
|
||
|
|
assert Timedelta("1D") == conv(np.timedelta64(1, "D"))
|
||
|
|
assert Timedelta("10D") == conv(np.timedelta64(10, "D"))
|
||
|
|
assert Timedelta("100D") == conv(np.timedelta64(100, "D"))
|
||
|
|
assert Timedelta("1000D") == conv(np.timedelta64(1000, "D"))
|
||
|
|
assert Timedelta("10000D") == conv(np.timedelta64(10000, "D"))
|
||
|
|
|
||
|
|
# space
|
||
|
|
assert Timedelta(" 10000D ") == conv(np.timedelta64(10000, "D"))
|
||
|
|
assert Timedelta(" - 10000D ") == -conv(np.timedelta64(10000, "D"))
|
||
|
|
|
||
|
|
# invalid
|
||
|
|
msg = "invalid unit abbreviation"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
Timedelta("1foo")
|
||
|
|
msg = "unit abbreviation w/o a number"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
Timedelta("foo")
|
||
|
|
|
||
|
|
def test_full_format_converters(self):
|
||
|
|
def conv(v):
|
||
|
|
return v.astype("m8[ns]")
|
||
|
|
|
||
|
|
d1 = np.timedelta64(1, "D")
|
||
|
|
|
||
|
|
assert Timedelta("1days") == conv(d1)
|
||
|
|
assert Timedelta("1days,") == conv(d1)
|
||
|
|
assert Timedelta("- 1days,") == -conv(d1)
|
||
|
|
|
||
|
|
assert Timedelta("00:00:01") == conv(np.timedelta64(1, "s"))
|
||
|
|
assert Timedelta("06:00:01") == conv(np.timedelta64(6 * 3600 + 1, "s"))
|
||
|
|
assert Timedelta("06:00:01.0") == conv(np.timedelta64(6 * 3600 + 1, "s"))
|
||
|
|
assert Timedelta("06:00:01.01") == conv(
|
||
|
|
np.timedelta64(1000 * (6 * 3600 + 1) + 10, "ms")
|
||
|
|
)
|
||
|
|
|
||
|
|
assert Timedelta("- 1days, 00:00:01") == conv(-d1 + np.timedelta64(1, "s"))
|
||
|
|
assert Timedelta("1days, 06:00:01") == conv(
|
||
|
|
d1 + np.timedelta64(6 * 3600 + 1, "s")
|
||
|
|
)
|
||
|
|
assert Timedelta("1days, 06:00:01.01") == conv(
|
||
|
|
d1 + np.timedelta64(1000 * (6 * 3600 + 1) + 10, "ms")
|
||
|
|
)
|
||
|
|
|
||
|
|
# invalid
|
||
|
|
msg = "have leftover units"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
Timedelta("- 1days, 00")
|
||
|
|
|
||
|
|
def test_pickle(self):
|
||
|
|
|
||
|
|
v = Timedelta("1 days 10:11:12.0123456")
|
||
|
|
v_p = tm.round_trip_pickle(v)
|
||
|
|
assert v == v_p
|
||
|
|
|
||
|
|
def test_timedelta_hash_equality(self):
|
||
|
|
# GH 11129
|
||
|
|
v = Timedelta(1, "D")
|
||
|
|
td = timedelta(days=1)
|
||
|
|
assert hash(v) == hash(td)
|
||
|
|
|
||
|
|
d = {td: 2}
|
||
|
|
assert d[v] == 2
|
||
|
|
|
||
|
|
tds = [Timedelta(seconds=1) + Timedelta(days=n) for n in range(20)]
|
||
|
|
assert all(hash(td) == hash(td.to_pytimedelta()) for td in tds)
|
||
|
|
|
||
|
|
# python timedeltas drop ns resolution
|
||
|
|
ns_td = Timedelta(1, "ns")
|
||
|
|
assert hash(ns_td) != hash(ns_td.to_pytimedelta())
|
||
|
|
|
||
|
|
def test_implementation_limits(self):
|
||
|
|
min_td = Timedelta(Timedelta.min)
|
||
|
|
max_td = Timedelta(Timedelta.max)
|
||
|
|
|
||
|
|
# GH 12727
|
||
|
|
# timedelta limits correspond to int64 boundaries
|
||
|
|
assert min_td.value == np.iinfo(np.int64).min + 1
|
||
|
|
assert max_td.value == np.iinfo(np.int64).max
|
||
|
|
|
||
|
|
# Beyond lower limit, a NAT before the Overflow
|
||
|
|
assert (min_td - Timedelta(1, "ns")) is NaT
|
||
|
|
|
||
|
|
msg = "int too (large|big) to convert"
|
||
|
|
with pytest.raises(OverflowError, match=msg):
|
||
|
|
min_td - Timedelta(2, "ns")
|
||
|
|
|
||
|
|
with pytest.raises(OverflowError, match=msg):
|
||
|
|
max_td + Timedelta(1, "ns")
|
||
|
|
|
||
|
|
# Same tests using the internal nanosecond values
|
||
|
|
td = Timedelta(min_td.value - 1, "ns")
|
||
|
|
assert td is NaT
|
||
|
|
|
||
|
|
with pytest.raises(OverflowError, match=msg):
|
||
|
|
Timedelta(min_td.value - 2, "ns")
|
||
|
|
|
||
|
|
with pytest.raises(OverflowError, match=msg):
|
||
|
|
Timedelta(max_td.value + 1, "ns")
|
||
|
|
|
||
|
|
def test_total_seconds_precision(self):
|
||
|
|
# GH 19458
|
||
|
|
assert Timedelta("30S").total_seconds() == 30.0
|
||
|
|
assert Timedelta("0").total_seconds() == 0.0
|
||
|
|
assert Timedelta("-2S").total_seconds() == -2.0
|
||
|
|
assert Timedelta("5.324S").total_seconds() == 5.324
|
||
|
|
assert (Timedelta("30S").total_seconds() - 30.0) < 1e-20
|
||
|
|
assert (30.0 - Timedelta("30S").total_seconds()) < 1e-20
|
||
|
|
|
||
|
|
def test_resolution_string(self):
|
||
|
|
assert Timedelta(days=1).resolution_string == "D"
|
||
|
|
assert Timedelta(days=1, hours=6).resolution_string == "H"
|
||
|
|
assert Timedelta(days=1, minutes=6).resolution_string == "T"
|
||
|
|
assert Timedelta(days=1, seconds=6).resolution_string == "S"
|
||
|
|
assert Timedelta(days=1, milliseconds=6).resolution_string == "L"
|
||
|
|
assert Timedelta(days=1, microseconds=6).resolution_string == "U"
|
||
|
|
assert Timedelta(days=1, nanoseconds=6).resolution_string == "N"
|
||
|
|
|
||
|
|
def test_resolution_deprecated(self):
|
||
|
|
# GH#21344
|
||
|
|
td = Timedelta(days=4, hours=3)
|
||
|
|
result = td.resolution
|
||
|
|
assert result == Timedelta(nanoseconds=1)
|
||
|
|
|
||
|
|
# Check that the attribute is available on the class, mirroring
|
||
|
|
# the stdlib timedelta behavior
|
||
|
|
result = Timedelta.resolution
|
||
|
|
assert result == Timedelta(nanoseconds=1)
|
||
|
|
|
||
|
|
|
||
|
|
@pytest.mark.parametrize(
|
||
|
|
"value, expected",
|
||
|
|
[
|
||
|
|
(Timedelta("10S"), True),
|
||
|
|
(Timedelta("-10S"), True),
|
||
|
|
(Timedelta(10, unit="ns"), True),
|
||
|
|
(Timedelta(0, unit="ns"), False),
|
||
|
|
(Timedelta(-10, unit="ns"), True),
|
||
|
|
(Timedelta(None), True),
|
||
|
|
(NaT, True),
|
||
|
|
],
|
||
|
|
)
|
||
|
|
def test_truthiness(value, expected):
|
||
|
|
# https://github.com/pandas-dev/pandas/issues/21484
|
||
|
|
assert bool(value) is expected
|
||
|
|
|
||
|
|
|
||
|
|
def test_timedelta_attribute_precision():
|
||
|
|
# GH 31354
|
||
|
|
td = Timedelta(1552211999999999872, unit="ns")
|
||
|
|
result = td.days * 86400
|
||
|
|
result += td.seconds
|
||
|
|
result *= 1000000
|
||
|
|
result += td.microseconds
|
||
|
|
result *= 1000
|
||
|
|
result += td.nanoseconds
|
||
|
|
expected = td.value
|
||
|
|
assert result == expected
|