from datetime import datetime
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import re
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import numpy as np
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import pytest
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from pandas import (
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Index,
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NaT,
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Timedelta,
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TimedeltaIndex,
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Timestamp,
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notna,
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offsets,
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timedelta_range,
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to_timedelta,
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)
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import pandas._testing as tm
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class TestGetItem:
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def test_getitem_slice_keeps_name(self):
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# GH#4226
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tdi = timedelta_range("1d", "5d", freq="H", name="timebucket")
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assert tdi[1:].name == tdi.name
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def test_getitem(self):
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idx1 = timedelta_range("1 day", "31 day", freq="D", name="idx")
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for idx in [idx1]:
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result = idx[0]
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assert result == Timedelta("1 day")
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result = idx[0:5]
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expected = timedelta_range("1 day", "5 day", freq="D", name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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result = idx[0:10:2]
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expected = timedelta_range("1 day", "9 day", freq="2D", name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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result = idx[-20:-5:3]
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expected = timedelta_range("12 day", "24 day", freq="3D", name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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result = idx[4::-1]
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expected = TimedeltaIndex(
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["5 day", "4 day", "3 day", "2 day", "1 day"], freq="-1D", name="idx"
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)
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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@pytest.mark.parametrize(
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"key",
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[
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Timestamp("1970-01-01"),
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Timestamp("1970-01-02"),
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datetime(1970, 1, 1),
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Timestamp("1970-01-03").to_datetime64(),
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# non-matching NA values
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np.datetime64("NaT"),
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],
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)
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def test_timestamp_invalid_key(self, key):
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# GH#20464
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tdi = timedelta_range(0, periods=10)
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with pytest.raises(KeyError, match=re.escape(repr(key))):
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tdi.get_loc(key)
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class TestGetLoc:
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def test_get_loc_key_unit_mismatch(self):
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idx = to_timedelta(["0 days", "1 days", "2 days"])
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key = idx[1].as_unit("ms")
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loc = idx.get_loc(key)
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assert loc == 1
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def test_get_loc_key_unit_mismatch_not_castable(self):
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tdi = to_timedelta(["0 days", "1 days", "2 days"]).astype("m8[s]")
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assert tdi.dtype == "m8[s]"
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key = tdi[0].as_unit("ns") + Timedelta(1)
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with pytest.raises(KeyError, match=r"Timedelta\('0 days 00:00:00.000000001'\)"):
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tdi.get_loc(key)
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assert key not in tdi
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def test_get_loc(self):
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idx = to_timedelta(["0 days", "1 days", "2 days"])
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# GH 16909
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assert idx.get_loc(idx[1].to_timedelta64()) == 1
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# GH 16896
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assert idx.get_loc("0 days") == 0
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def test_get_loc_nat(self):
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tidx = TimedeltaIndex(["1 days 01:00:00", "NaT", "2 days 01:00:00"])
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assert tidx.get_loc(NaT) == 1
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assert tidx.get_loc(None) == 1
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assert tidx.get_loc(float("nan")) == 1
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assert tidx.get_loc(np.nan) == 1
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class TestGetIndexer:
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def test_get_indexer(self):
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idx = to_timedelta(["0 days", "1 days", "2 days"])
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tm.assert_numpy_array_equal(
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idx.get_indexer(idx), np.array([0, 1, 2], dtype=np.intp)
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)
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target = to_timedelta(["-1 hour", "12 hours", "1 day 1 hour"])
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tm.assert_numpy_array_equal(
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idx.get_indexer(target, "pad"), np.array([-1, 0, 1], dtype=np.intp)
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)
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tm.assert_numpy_array_equal(
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idx.get_indexer(target, "backfill"), np.array([0, 1, 2], dtype=np.intp)
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)
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tm.assert_numpy_array_equal(
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idx.get_indexer(target, "nearest"), np.array([0, 1, 1], dtype=np.intp)
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)
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res = idx.get_indexer(target, "nearest", tolerance=Timedelta("1 hour"))
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tm.assert_numpy_array_equal(res, np.array([0, -1, 1], dtype=np.intp))
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class TestWhere:
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def test_where_doesnt_retain_freq(self):
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tdi = timedelta_range("1 day", periods=3, freq="D", name="idx")
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cond = [True, True, False]
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expected = TimedeltaIndex([tdi[0], tdi[1], tdi[0]], freq=None, name="idx")
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result = tdi.where(cond, tdi[::-1])
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tm.assert_index_equal(result, expected)
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def test_where_invalid_dtypes(self, fixed_now_ts):
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tdi = timedelta_range("1 day", periods=3, freq="D", name="idx")
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tail = tdi[2:].tolist()
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i2 = Index([NaT, NaT] + tail)
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mask = notna(i2)
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expected = Index([NaT._value, NaT._value] + tail, dtype=object, name="idx")
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assert isinstance(expected[0], int)
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result = tdi.where(mask, i2.asi8)
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tm.assert_index_equal(result, expected)
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ts = i2 + fixed_now_ts
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expected = Index([ts[0], ts[1]] + tail, dtype=object, name="idx")
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result = tdi.where(mask, ts)
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tm.assert_index_equal(result, expected)
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per = (i2 + fixed_now_ts).to_period("D")
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expected = Index([per[0], per[1]] + tail, dtype=object, name="idx")
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result = tdi.where(mask, per)
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tm.assert_index_equal(result, expected)
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ts = fixed_now_ts
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expected = Index([ts, ts] + tail, dtype=object, name="idx")
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result = tdi.where(mask, ts)
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tm.assert_index_equal(result, expected)
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def test_where_mismatched_nat(self):
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tdi = timedelta_range("1 day", periods=3, freq="D", name="idx")
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cond = np.array([True, False, False])
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dtnat = np.datetime64("NaT", "ns")
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expected = Index([tdi[0], dtnat, dtnat], dtype=object, name="idx")
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assert expected[2] is dtnat
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result = tdi.where(cond, dtnat)
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tm.assert_index_equal(result, expected)
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class TestTake:
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def test_take(self):
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# GH 10295
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idx1 = timedelta_range("1 day", "31 day", freq="D", name="idx")
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for idx in [idx1]:
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result = idx.take([0])
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assert result == Timedelta("1 day")
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result = idx.take([-1])
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assert result == Timedelta("31 day")
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result = idx.take([0, 1, 2])
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expected = timedelta_range("1 day", "3 day", freq="D", name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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result = idx.take([0, 2, 4])
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expected = timedelta_range("1 day", "5 day", freq="2D", name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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result = idx.take([7, 4, 1])
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expected = timedelta_range("8 day", "2 day", freq="-3D", name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq == expected.freq
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result = idx.take([3, 2, 5])
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expected = TimedeltaIndex(["4 day", "3 day", "6 day"], name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq is None
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result = idx.take([-3, 2, 5])
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expected = TimedeltaIndex(["29 day", "3 day", "6 day"], name="idx")
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tm.assert_index_equal(result, expected)
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assert result.freq is None
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def test_take_invalid_kwargs(self):
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idx = timedelta_range("1 day", "31 day", freq="D", name="idx")
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indices = [1, 6, 5, 9, 10, 13, 15, 3]
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msg = r"take\(\) got an unexpected keyword argument 'foo'"
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with pytest.raises(TypeError, match=msg):
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idx.take(indices, foo=2)
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msg = "the 'out' parameter is not supported"
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with pytest.raises(ValueError, match=msg):
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idx.take(indices, out=indices)
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msg = "the 'mode' parameter is not supported"
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with pytest.raises(ValueError, match=msg):
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idx.take(indices, mode="clip")
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def test_take_equiv_getitem(self):
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tds = ["1day 02:00:00", "1 day 04:00:00", "1 day 10:00:00"]
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idx = timedelta_range(start="1d", end="2d", freq="H", name="idx")
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expected = TimedeltaIndex(tds, freq=None, name="idx")
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taken1 = idx.take([2, 4, 10])
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taken2 = idx[[2, 4, 10]]
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for taken in [taken1, taken2]:
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tm.assert_index_equal(taken, expected)
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assert isinstance(taken, TimedeltaIndex)
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assert taken.freq is None
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assert taken.name == expected.name
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def test_take_fill_value(self):
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# GH 12631
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idx = TimedeltaIndex(["1 days", "2 days", "3 days"], name="xxx")
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result = idx.take(np.array([1, 0, -1]))
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expected = TimedeltaIndex(["2 days", "1 days", "3 days"], name="xxx")
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tm.assert_index_equal(result, expected)
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# fill_value
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result = idx.take(np.array([1, 0, -1]), fill_value=True)
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expected = TimedeltaIndex(["2 days", "1 days", "NaT"], name="xxx")
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tm.assert_index_equal(result, expected)
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# allow_fill=False
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result = idx.take(np.array([1, 0, -1]), allow_fill=False, fill_value=True)
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expected = TimedeltaIndex(["2 days", "1 days", "3 days"], name="xxx")
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tm.assert_index_equal(result, expected)
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msg = (
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"When allow_fill=True and fill_value is not None, "
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"all indices must be >= -1"
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)
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with pytest.raises(ValueError, match=msg):
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idx.take(np.array([1, 0, -2]), fill_value=True)
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with pytest.raises(ValueError, match=msg):
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idx.take(np.array([1, 0, -5]), fill_value=True)
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msg = "index -5 is out of bounds for (axis 0 with )?size 3"
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with pytest.raises(IndexError, match=msg):
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idx.take(np.array([1, -5]))
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class TestMaybeCastSliceBound:
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@pytest.fixture(params=["increasing", "decreasing", None])
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def monotonic(self, request):
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return request.param
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@pytest.fixture
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def tdi(self, monotonic):
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tdi = timedelta_range("1 Day", periods=10)
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if monotonic == "decreasing":
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tdi = tdi[::-1]
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elif monotonic is None:
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taker = np.arange(10, dtype=np.intp)
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np.random.shuffle(taker)
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tdi = tdi.take(taker)
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return tdi
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def test_maybe_cast_slice_bound_invalid_str(self, tdi):
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# test the low-level _maybe_cast_slice_bound and that we get the
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# expected exception+message all the way up the stack
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msg = (
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"cannot do slice indexing on TimedeltaIndex with these "
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r"indexers \[foo\] of type str"
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)
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with pytest.raises(TypeError, match=msg):
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tdi._maybe_cast_slice_bound("foo", side="left")
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with pytest.raises(TypeError, match=msg):
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tdi.get_slice_bound("foo", side="left")
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with pytest.raises(TypeError, match=msg):
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tdi.slice_locs("foo", None, None)
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def test_slice_invalid_str_with_timedeltaindex(
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self, tdi, frame_or_series, indexer_sl
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):
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obj = frame_or_series(range(10), index=tdi)
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msg = (
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"cannot do slice indexing on TimedeltaIndex with these "
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r"indexers \[foo\] of type str"
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)
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with pytest.raises(TypeError, match=msg):
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indexer_sl(obj)["foo":]
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with pytest.raises(TypeError, match=msg):
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indexer_sl(obj)["foo":-1]
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with pytest.raises(TypeError, match=msg):
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indexer_sl(obj)[:"foo"]
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with pytest.raises(TypeError, match=msg):
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indexer_sl(obj)[tdi[0] : "foo"]
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class TestContains:
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def test_contains_nonunique(self):
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# GH#9512
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for vals in (
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[0, 1, 0],
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[0, 0, -1],
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[0, -1, -1],
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["00:01:00", "00:01:00", "00:02:00"],
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["00:01:00", "00:01:00", "00:00:01"],
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):
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idx = TimedeltaIndex(vals)
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assert idx[0] in idx
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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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td = to_timedelta(range(5), unit="d") + offsets.Hour(1)
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for v in [NaT, None, float("nan"), np.nan]:
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assert v not in td
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td = to_timedelta([NaT])
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for v in [NaT, None, float("nan"), np.nan]:
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assert v in td
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