""" test the scalar Timedelta """
|
from datetime import timedelta
|
import sys
|
|
from hypothesis import (
|
given,
|
strategies as st,
|
)
|
import numpy as np
|
import pytest
|
|
from pandas._libs import lib
|
from pandas._libs.tslibs import (
|
NaT,
|
iNaT,
|
)
|
from pandas._libs.tslibs.dtypes import NpyDatetimeUnit
|
from pandas.errors import OutOfBoundsTimedelta
|
|
from pandas import (
|
Timedelta,
|
to_timedelta,
|
)
|
import pandas._testing as tm
|
|
|
class TestNonNano:
|
@pytest.fixture(params=["s", "ms", "us"])
|
def unit_str(self, request):
|
return request.param
|
|
@pytest.fixture
|
def unit(self, unit_str):
|
# 7, 8, 9 correspond to second, millisecond, and microsecond, respectively
|
attr = f"NPY_FR_{unit_str}"
|
return getattr(NpyDatetimeUnit, attr).value
|
|
@pytest.fixture
|
def val(self, unit):
|
# microsecond that would be just out of bounds for nano
|
us = 9223372800000000
|
if unit == NpyDatetimeUnit.NPY_FR_us.value:
|
value = us
|
elif unit == NpyDatetimeUnit.NPY_FR_ms.value:
|
value = us // 1000
|
else:
|
value = us // 1_000_000
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return value
|
|
@pytest.fixture
|
def td(self, unit, val):
|
return Timedelta._from_value_and_reso(val, unit)
|
|
def test_from_value_and_reso(self, unit, val):
|
# Just checking that the fixture is giving us what we asked for
|
td = Timedelta._from_value_and_reso(val, unit)
|
assert td._value == val
|
assert td._creso == unit
|
assert td.days == 106752
|
|
def test_unary_non_nano(self, td, unit):
|
assert abs(td)._creso == unit
|
assert (-td)._creso == unit
|
assert (+td)._creso == unit
|
|
def test_sub_preserves_reso(self, td, unit):
|
res = td - td
|
expected = Timedelta._from_value_and_reso(0, unit)
|
assert res == expected
|
assert res._creso == unit
|
|
def test_mul_preserves_reso(self, td, unit):
|
# The td fixture should always be far from the implementation
|
# bound, so doubling does not risk overflow.
|
res = td * 2
|
assert res._value == td._value * 2
|
assert res._creso == unit
|
|
def test_cmp_cross_reso(self, td):
|
# numpy gets this wrong because of silent overflow
|
other = Timedelta(days=106751, unit="ns")
|
assert other < td
|
assert td > other
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assert not other == td
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assert td != other
|
|
def test_to_pytimedelta(self, td):
|
res = td.to_pytimedelta()
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expected = timedelta(days=106752)
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assert type(res) is timedelta
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assert res == expected
|
|
def test_to_timedelta64(self, td, unit):
|
for res in [td.to_timedelta64(), td.to_numpy(), td.asm8]:
|
assert isinstance(res, np.timedelta64)
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assert res.view("i8") == td._value
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if unit == NpyDatetimeUnit.NPY_FR_s.value:
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assert res.dtype == "m8[s]"
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elif unit == NpyDatetimeUnit.NPY_FR_ms.value:
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assert res.dtype == "m8[ms]"
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elif unit == NpyDatetimeUnit.NPY_FR_us.value:
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assert res.dtype == "m8[us]"
|
|
def test_truediv_timedeltalike(self, td):
|
assert td / td == 1
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assert (2.5 * td) / td == 2.5
|
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other = Timedelta(td._value)
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msg = "Cannot cast 106752 days 00:00:00 to unit='ns' without overflow."
|
with pytest.raises(OutOfBoundsTimedelta, match=msg):
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td / other
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# Timedelta(other.to_pytimedelta()) has microsecond resolution,
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# so the division doesn't require casting all the way to nanos,
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# so succeeds
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res = other.to_pytimedelta() / td
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expected = other.to_pytimedelta() / td.to_pytimedelta()
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assert res == expected
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# if there's no overflow, we cast to the higher reso
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left = Timedelta._from_value_and_reso(50, NpyDatetimeUnit.NPY_FR_us.value)
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right = Timedelta._from_value_and_reso(50, NpyDatetimeUnit.NPY_FR_ms.value)
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result = left / right
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assert result == 0.001
|
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result = right / left
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assert result == 1000
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def test_truediv_numeric(self, td):
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assert td / np.nan is NaT
|
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res = td / 2
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assert res._value == td._value / 2
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assert res._creso == td._creso
|
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res = td / 2.0
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assert res._value == td._value / 2
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assert res._creso == td._creso
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def test_floordiv_timedeltalike(self, td):
|
assert td // td == 1
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assert (2.5 * td) // td == 2
|
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other = Timedelta(td._value)
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msg = "Cannot cast 106752 days 00:00:00 to unit='ns' without overflow"
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with pytest.raises(OutOfBoundsTimedelta, match=msg):
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td // other
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# Timedelta(other.to_pytimedelta()) has microsecond resolution,
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# so the floordiv doesn't require casting all the way to nanos,
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# so succeeds
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res = other.to_pytimedelta() // td
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assert res == 0
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# if there's no overflow, we cast to the higher reso
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left = Timedelta._from_value_and_reso(50050, NpyDatetimeUnit.NPY_FR_us.value)
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right = Timedelta._from_value_and_reso(50, NpyDatetimeUnit.NPY_FR_ms.value)
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result = left // right
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assert result == 1
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result = right // left
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assert result == 0
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def test_floordiv_numeric(self, td):
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assert td // np.nan is NaT
|
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res = td // 2
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assert res._value == td._value // 2
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assert res._creso == td._creso
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res = td // 2.0
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assert res._value == td._value // 2
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assert res._creso == td._creso
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assert td // np.array(np.nan) is NaT
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res = td // np.array(2)
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assert res._value == td._value // 2
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assert res._creso == td._creso
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res = td // np.array(2.0)
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assert res._value == td._value // 2
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assert res._creso == td._creso
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def test_addsub_mismatched_reso(self, td):
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# need to cast to since td is out of bounds for ns, so
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# so we would raise OverflowError without casting
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other = Timedelta(days=1).as_unit("us")
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# td is out of bounds for ns
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result = td + other
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assert result._creso == other._creso
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assert result.days == td.days + 1
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result = other + td
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assert result._creso == other._creso
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assert result.days == td.days + 1
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result = td - other
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assert result._creso == other._creso
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assert result.days == td.days - 1
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result = other - td
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assert result._creso == other._creso
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assert result.days == 1 - td.days
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other2 = Timedelta(500)
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msg = "Cannot cast 106752 days 00:00:00 to unit='ns' without overflow"
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with pytest.raises(OutOfBoundsTimedelta, match=msg):
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td + other2
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with pytest.raises(OutOfBoundsTimedelta, match=msg):
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other2 + td
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with pytest.raises(OutOfBoundsTimedelta, match=msg):
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td - other2
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with pytest.raises(OutOfBoundsTimedelta, match=msg):
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other2 - td
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def test_min(self, td):
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assert td.min <= td
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assert td.min._creso == td._creso
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assert td.min._value == NaT._value + 1
|
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def test_max(self, td):
|
assert td.max >= td
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assert td.max._creso == td._creso
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assert td.max._value == np.iinfo(np.int64).max
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def test_resolution(self, td):
|
expected = Timedelta._from_value_and_reso(1, td._creso)
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result = td.resolution
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assert result == expected
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assert result._creso == expected._creso
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def test_hash(self) -> None:
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# GH#54037
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second_resolution_max = Timedelta(0).as_unit("s").max
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assert hash(second_resolution_max)
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|
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def test_timedelta_class_min_max_resolution():
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# when accessed on the class (as opposed to an instance), we default
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# to nanoseconds
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assert Timedelta.min == Timedelta(NaT._value + 1)
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assert Timedelta.min._creso == NpyDatetimeUnit.NPY_FR_ns.value
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assert Timedelta.max == Timedelta(np.iinfo(np.int64).max)
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assert Timedelta.max._creso == NpyDatetimeUnit.NPY_FR_ns.value
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assert Timedelta.resolution == Timedelta(1)
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assert Timedelta.resolution._creso == NpyDatetimeUnit.NPY_FR_ns.value
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|
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class TestTimedeltaUnaryOps:
|
def test_invert(self):
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td = Timedelta(10, unit="d")
|
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msg = "bad operand type for unary ~"
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with pytest.raises(TypeError, match=msg):
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~td
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# check this matches pytimedelta and timedelta64
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with pytest.raises(TypeError, match=msg):
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~(td.to_pytimedelta())
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umsg = "ufunc 'invert' not supported for the input types"
|
with pytest.raises(TypeError, match=umsg):
|
~(td.to_timedelta64())
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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:
|
@pytest.mark.parametrize(
|
"unit, value, expected",
|
[
|
("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):
|
# GH 12690
|
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
|
tm.assert_almost_equal(rng.total_seconds(), expt)
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rng = Timedelta(np.nan)
|
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")):
|
rng.hours
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with pytest.raises(AttributeError, match=msg.format("minutes")):
|
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")):
|
rng.hours
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with pytest.raises(AttributeError, match=msg.format("minutes")):
|
rng.minutes
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with pytest.raises(AttributeError, match=msg.format("milliseconds")):
|
rng.milliseconds
|
|
# components
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tup = to_timedelta(-1, "us").components
|
assert tup.days == -1
|
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)
|
|
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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# TODO: this is a test of to_timedelta string parsing
|
def test_iso_conversion(self):
|
# GH #21877
|
expected = Timedelta(1, unit="s")
|
assert to_timedelta("P0DT0H0M1S") == expected
|
|
# TODO: this is a test of to_timedelta returning NaT
|
def test_nat_converters(self):
|
result = to_timedelta("nat").to_numpy()
|
assert result.dtype.kind == "M"
|
assert result.astype("int64") == iNaT
|
|
result = to_timedelta("nan").to_numpy()
|
assert result.dtype.kind == "M"
|
assert result.astype("int64") == iNaT
|
|
def test_numeric_conversions(self):
|
assert Timedelta(0) == np.timedelta64(0, "ns")
|
assert Timedelta(10) == np.timedelta64(10, "ns")
|
assert Timedelta(10, unit="ns") == np.timedelta64(10, "ns")
|
|
assert Timedelta(10, unit="us") == np.timedelta64(10, "us")
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assert Timedelta(10, unit="ms") == np.timedelta64(10, "ms")
|
assert Timedelta(10, unit="s") == np.timedelta64(10, "s")
|
assert Timedelta(10, unit="d") == np.timedelta64(10, "D")
|
|
def test_timedelta_conversions(self):
|
assert Timedelta(timedelta(seconds=1)) == np.timedelta64(1, "s").astype(
|
"m8[ns]"
|
)
|
assert Timedelta(timedelta(microseconds=1)) == np.timedelta64(1, "us").astype(
|
"m8[ns]"
|
)
|
assert Timedelta(timedelta(days=1)) == np.timedelta64(1, "D").astype("m8[ns]")
|
|
def test_to_numpy_alias(self):
|
# 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()
|
|
# GH#44460
|
msg = "dtype and copy arguments are ignored"
|
with pytest.raises(ValueError, match=msg):
|
td.to_numpy("m8[s]")
|
with pytest.raises(ValueError, match=msg):
|
td.to_numpy(copy=True)
|
|
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())
|
|
@pytest.mark.skip_ubsan
|
@pytest.mark.xfail(
|
reason="pd.Timedelta violates the Python hash invariant (GH#44504).",
|
)
|
@given(
|
st.integers(
|
min_value=(-sys.maxsize - 1) // 500,
|
max_value=sys.maxsize // 500,
|
)
|
)
|
def test_hash_equality_invariance(self, half_microseconds: int) -> None:
|
# GH#44504
|
|
nanoseconds = half_microseconds * 500
|
|
pandas_timedelta = Timedelta(nanoseconds)
|
numpy_timedelta = np.timedelta64(nanoseconds)
|
|
# See: https://docs.python.org/3/glossary.html#term-hashable
|
# Hashable objects which compare equal must have the same hash value.
|
assert pandas_timedelta != numpy_timedelta or hash(pandas_timedelta) == hash(
|
numpy_timedelta
|
)
|
|
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 == iNaT + 1
|
assert max_td._value == lib.i8max
|
|
# 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
|
|
msg = "Cannot cast -9223372036854775809 from ns to 'ns' without overflow"
|
with pytest.raises(OutOfBoundsTimedelta, match=msg):
|
Timedelta(min_td._value - 2, "ns")
|
|
msg = "Cannot cast 9223372036854775808 from ns to 'ns' without overflow"
|
with pytest.raises(OutOfBoundsTimedelta, 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 == "min"
|
assert Timedelta(days=1, seconds=6).resolution_string == "s"
|
assert Timedelta(days=1, milliseconds=6).resolution_string == "ms"
|
assert Timedelta(days=1, microseconds=6).resolution_string == "us"
|
assert Timedelta(days=1, nanoseconds=6).resolution_string == "ns"
|
|
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
|
