212 lines
8.6 KiB
Python
212 lines
8.6 KiB
Python
# -*- coding: utf-8 -*-
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from datetime import timedelta
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import pytest
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import numpy as np
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import pandas as pd
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import pandas.util.testing as tm
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from pandas import Timedelta
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def test_construction():
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expected = np.timedelta64(10, 'D').astype('m8[ns]').view('i8')
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assert Timedelta(10, unit='d').value == expected
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assert Timedelta(10.0, unit='d').value == expected
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assert Timedelta('10 days').value == expected
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assert Timedelta(days=10).value == expected
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assert Timedelta(days=10.0).value == expected
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expected += np.timedelta64(10, 's').astype('m8[ns]').view('i8')
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assert Timedelta('10 days 00:00:10').value == expected
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assert Timedelta(days=10, seconds=10).value == expected
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assert Timedelta(days=10, milliseconds=10 * 1000).value == expected
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assert Timedelta(days=10,
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microseconds=10 * 1000 * 1000).value == expected
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# rounding cases
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assert Timedelta(82739999850000).value == 82739999850000
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assert ('0 days 22:58:59.999850' in str(Timedelta(82739999850000)))
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assert Timedelta(123072001000000).value == 123072001000000
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assert ('1 days 10:11:12.001' in str(Timedelta(123072001000000)))
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# string conversion with/without leading zero
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# GH#9570
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assert Timedelta('0:00:00') == timedelta(hours=0)
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assert Timedelta('00:00:00') == timedelta(hours=0)
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assert Timedelta('-1:00:00') == -timedelta(hours=1)
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assert Timedelta('-01:00:00') == -timedelta(hours=1)
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# more strings & abbrevs
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# GH#8190
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assert Timedelta('1 h') == timedelta(hours=1)
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assert Timedelta('1 hour') == timedelta(hours=1)
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assert Timedelta('1 hr') == timedelta(hours=1)
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assert Timedelta('1 hours') == timedelta(hours=1)
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assert Timedelta('-1 hours') == -timedelta(hours=1)
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assert Timedelta('1 m') == timedelta(minutes=1)
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assert Timedelta('1.5 m') == timedelta(seconds=90)
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assert Timedelta('1 minute') == timedelta(minutes=1)
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assert Timedelta('1 minutes') == timedelta(minutes=1)
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assert Timedelta('1 s') == timedelta(seconds=1)
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assert Timedelta('1 second') == timedelta(seconds=1)
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assert Timedelta('1 seconds') == timedelta(seconds=1)
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assert Timedelta('1 ms') == timedelta(milliseconds=1)
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assert Timedelta('1 milli') == timedelta(milliseconds=1)
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assert Timedelta('1 millisecond') == timedelta(milliseconds=1)
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assert Timedelta('1 us') == timedelta(microseconds=1)
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assert Timedelta('1 micros') == timedelta(microseconds=1)
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assert Timedelta('1 microsecond') == timedelta(microseconds=1)
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assert Timedelta('1.5 microsecond') == Timedelta('00:00:00.000001500')
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assert Timedelta('1 ns') == Timedelta('00:00:00.000000001')
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assert Timedelta('1 nano') == Timedelta('00:00:00.000000001')
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assert Timedelta('1 nanosecond') == Timedelta('00:00:00.000000001')
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# combos
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assert Timedelta('10 days 1 hour') == timedelta(days=10, hours=1)
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assert Timedelta('10 days 1 h') == timedelta(days=10, hours=1)
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assert Timedelta('10 days 1 h 1m 1s') == timedelta(
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days=10, hours=1, minutes=1, seconds=1)
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assert Timedelta('-10 days 1 h 1m 1s') == -timedelta(
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days=10, hours=1, minutes=1, seconds=1)
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assert Timedelta('-10 days 1 h 1m 1s') == -timedelta(
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days=10, hours=1, minutes=1, seconds=1)
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assert Timedelta('-10 days 1 h 1m 1s 3us') == -timedelta(
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days=10, hours=1, minutes=1, seconds=1, microseconds=3)
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assert Timedelta('-10 days 1 h 1.5m 1s 3us') == -timedelta(
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days=10, hours=1, minutes=1, seconds=31, microseconds=3)
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# Currently invalid as it has a - on the hh:mm:dd part
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# (only allowed on the days)
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with pytest.raises(ValueError):
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Timedelta('-10 days -1 h 1.5m 1s 3us')
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# only leading neg signs are allowed
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with pytest.raises(ValueError):
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Timedelta('10 days -1 h 1.5m 1s 3us')
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# no units specified
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with pytest.raises(ValueError):
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Timedelta('3.1415')
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# invalid construction
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tm.assert_raises_regex(ValueError, "cannot construct a Timedelta",
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lambda: Timedelta())
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tm.assert_raises_regex(ValueError,
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"unit abbreviation w/o a number",
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lambda: Timedelta('foo'))
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tm.assert_raises_regex(ValueError,
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"cannot construct a Timedelta from the "
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"passed arguments, allowed keywords are ",
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lambda: Timedelta(day=10))
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# floats
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expected = np.timedelta64(
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10, 's').astype('m8[ns]').view('i8') + np.timedelta64(
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500, 'ms').astype('m8[ns]').view('i8')
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assert Timedelta(10.5, unit='s').value == expected
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# offset
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assert pd.to_timedelta(pd.offsets.Hour(2)) == Timedelta(hours=2)
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assert Timedelta(pd.offsets.Hour(2)) == Timedelta(hours=2)
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assert Timedelta(pd.offsets.Second(2)) == Timedelta(seconds=2)
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# GH#11995: unicode
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expected = Timedelta('1H')
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result = pd.Timedelta(u'1H')
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assert result == expected
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assert (pd.to_timedelta(pd.offsets.Hour(2)) ==
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Timedelta(u'0 days, 02:00:00'))
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with pytest.raises(ValueError):
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Timedelta(u'foo bar')
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@pytest.mark.parametrize('item', list({'days': 'D',
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'seconds': 's',
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'microseconds': 'us',
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'milliseconds': 'ms',
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'minutes': 'm',
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'hours': 'h',
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'weeks': 'W'}.items()))
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@pytest.mark.parametrize('npdtype', [np.int64, np.int32, np.int16,
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np.float64, np.float32, np.float16])
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def test_td_construction_with_np_dtypes(npdtype, item):
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# GH#8757: test construction with np dtypes
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pykwarg, npkwarg = item
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expected = np.timedelta64(1, npkwarg).astype('m8[ns]').view('i8')
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assert Timedelta(**{pykwarg: npdtype(1)}).value == expected
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@pytest.mark.parametrize('val', [
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'1s', '-1s', '1us', '-1us', '1 day', '-1 day',
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'-23:59:59.999999', '-1 days +23:59:59.999999', '-1ns',
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'1ns', '-23:59:59.999999999'])
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def test_td_from_repr_roundtrip(val):
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# round-trip both for string and value
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td = Timedelta(val)
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assert Timedelta(td.value) == td
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# str does not normally display nanos
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if not td.nanoseconds:
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assert Timedelta(str(td)) == td
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assert Timedelta(td._repr_base(format='all')) == td
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def test_overflow_on_construction():
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# xref https://github.com/statsmodels/statsmodels/issues/3374
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value = pd.Timedelta('1day').value * 20169940
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with pytest.raises(OverflowError):
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pd.Timedelta(value)
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# xref GH#17637
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with pytest.raises(OverflowError):
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pd.Timedelta(7 * 19999, unit='D')
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with pytest.raises(OverflowError):
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pd.Timedelta(timedelta(days=13 * 19999))
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@pytest.mark.parametrize('fmt,exp', [
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('P6DT0H50M3.010010012S', Timedelta(days=6, minutes=50, seconds=3,
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milliseconds=10, microseconds=10,
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nanoseconds=12)),
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('P-6DT0H50M3.010010012S', Timedelta(days=-6, minutes=50, seconds=3,
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milliseconds=10, microseconds=10,
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nanoseconds=12)),
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('P4DT12H30M5S', Timedelta(days=4, hours=12, minutes=30, seconds=5)),
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('P0DT0H0M0.000000123S', Timedelta(nanoseconds=123)),
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('P0DT0H0M0.00001S', Timedelta(microseconds=10)),
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('P0DT0H0M0.001S', Timedelta(milliseconds=1)),
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('P0DT0H1M0S', Timedelta(minutes=1)),
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('P1DT25H61M61S', Timedelta(days=1, hours=25, minutes=61, seconds=61))
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])
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def test_iso_constructor(fmt, exp):
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assert Timedelta(fmt) == exp
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@pytest.mark.parametrize('fmt', [
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'PPPPPPPPPPPP', 'PDTHMS', 'P0DT999H999M999S',
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'P1DT0H0M0.0000000000000S', 'P1DT0H0M00000000000S',
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'P1DT0H0M0.S'])
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def test_iso_constructor_raises(fmt):
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with tm.assert_raises_regex(ValueError, 'Invalid ISO 8601 Duration '
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'format - {}'.format(fmt)):
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Timedelta(fmt)
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@pytest.mark.parametrize('constructed_td, conversion', [
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(Timedelta(nanoseconds=100), '100ns'),
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(Timedelta(days=1, hours=1, minutes=1, weeks=1, seconds=1, milliseconds=1,
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microseconds=1, nanoseconds=1), 694861001001001),
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(Timedelta(microseconds=1) + Timedelta(nanoseconds=1), '1us1ns'),
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(Timedelta(microseconds=1) - Timedelta(nanoseconds=1), '999ns'),
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(Timedelta(microseconds=1) + 5 * Timedelta(nanoseconds=-2), '990ns')])
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def test_td_constructor_on_nanoseconds(constructed_td, conversion):
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# GH#9273
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assert constructed_td == Timedelta(conversion)
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def test_td_constructor_value_error():
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with pytest.raises(TypeError):
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Timedelta(nanoseconds='abc')
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