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| import numpy as np
| import pytest
|
| from pandas import (
| Timedelta,
| TimedeltaIndex,
| timedelta_range,
| to_timedelta,
| )
| import pandas._testing as tm
|
| from pandas.tseries.offsets import (
| Day,
| Second,
| )
|
|
| class TestTimedeltas:
| def test_timedelta_range_unit(self):
| # GH#49824
| tdi = timedelta_range("0 Days", periods=10, freq="100000D", unit="s")
| exp_arr = (np.arange(10, dtype="i8") * 100_000).view("m8[D]").astype("m8[s]")
| tm.assert_numpy_array_equal(tdi.to_numpy(), exp_arr)
|
| def test_timedelta_range(self):
| expected = to_timedelta(np.arange(5), unit="D")
| result = timedelta_range("0 days", periods=5, freq="D")
| tm.assert_index_equal(result, expected)
|
| expected = to_timedelta(np.arange(11), unit="D")
| result = timedelta_range("0 days", "10 days", freq="D")
| tm.assert_index_equal(result, expected)
|
| expected = to_timedelta(np.arange(5), unit="D") + Second(2) + Day()
| result = timedelta_range("1 days, 00:00:02", "5 days, 00:00:02", freq="D")
| tm.assert_index_equal(result, expected)
|
| expected = to_timedelta([1, 3, 5, 7, 9], unit="D") + Second(2)
| result = timedelta_range("1 days, 00:00:02", periods=5, freq="2D")
| tm.assert_index_equal(result, expected)
|
| expected = to_timedelta(np.arange(50), unit="min") * 30
| result = timedelta_range("0 days", freq="30min", periods=50)
| tm.assert_index_equal(result, expected)
|
| @pytest.mark.parametrize(
| "depr_unit, unit",
| [
| ("H", "hour"),
| ("T", "minute"),
| ("t", "minute"),
| ("S", "second"),
| ("L", "millisecond"),
| ("l", "millisecond"),
| ("U", "microsecond"),
| ("u", "microsecond"),
| ("N", "nanosecond"),
| ("n", "nanosecond"),
| ],
| )
| def test_timedelta_units_H_T_S_L_U_N_deprecated(self, depr_unit, unit):
| # GH#52536
| depr_msg = (
| f"'{depr_unit}' is deprecated and will be removed in a future version."
| )
|
| expected = to_timedelta(np.arange(5), unit=unit)
| with tm.assert_produces_warning(FutureWarning, match=depr_msg):
| result = to_timedelta(np.arange(5), unit=depr_unit)
| tm.assert_index_equal(result, expected)
|
| @pytest.mark.parametrize(
| "periods, freq", [(3, "2D"), (5, "D"), (6, "19h12min"), (7, "16h"), (9, "12h")]
| )
| def test_linspace_behavior(self, periods, freq):
| # GH 20976
| result = timedelta_range(start="0 days", end="4 days", periods=periods)
| expected = timedelta_range(start="0 days", end="4 days", freq=freq)
| tm.assert_index_equal(result, expected)
|
| @pytest.mark.parametrize("msg_freq, freq", [("H", "19H12min"), ("T", "19h12T")])
| def test_timedelta_range_H_T_deprecated(self, freq, msg_freq):
| # GH#52536
| msg = f"'{msg_freq}' is deprecated and will be removed in a future version."
|
| result = timedelta_range(start="0 days", end="4 days", periods=6)
| with tm.assert_produces_warning(FutureWarning, match=msg):
| expected = timedelta_range(start="0 days", end="4 days", freq=freq)
| tm.assert_index_equal(result, expected)
|
| def test_errors(self):
| # not enough params
| msg = (
| "Of the four parameters: start, end, periods, and freq, "
| "exactly three must be specified"
| )
| with pytest.raises(ValueError, match=msg):
| timedelta_range(start="0 days")
|
| with pytest.raises(ValueError, match=msg):
| timedelta_range(end="5 days")
|
| with pytest.raises(ValueError, match=msg):
| timedelta_range(periods=2)
|
| with pytest.raises(ValueError, match=msg):
| timedelta_range()
|
| # too many params
| with pytest.raises(ValueError, match=msg):
| timedelta_range(start="0 days", end="5 days", periods=10, freq="h")
|
| @pytest.mark.parametrize(
| "start, end, freq, expected_periods",
| [
| ("1D", "10D", "2D", (10 - 1) // 2 + 1),
| ("2D", "30D", "3D", (30 - 2) // 3 + 1),
| ("2s", "50s", "5s", (50 - 2) // 5 + 1),
| # tests that worked before GH 33498:
| ("4D", "16D", "3D", (16 - 4) // 3 + 1),
| ("8D", "16D", "40s", (16 * 3600 * 24 - 8 * 3600 * 24) // 40 + 1),
| ],
| )
| def test_timedelta_range_freq_divide_end(self, start, end, freq, expected_periods):
| # GH 33498 only the cases where `(end % freq) == 0` used to fail
| res = timedelta_range(start=start, end=end, freq=freq)
| assert Timedelta(start) == res[0]
| assert Timedelta(end) >= res[-1]
| assert len(res) == expected_periods
|
| def test_timedelta_range_infer_freq(self):
| # https://github.com/pandas-dev/pandas/issues/35897
| result = timedelta_range("0s", "1s", periods=31)
| assert result.freq is None
|
| @pytest.mark.parametrize(
| "freq_depr, start, end, expected_values, expected_freq",
| [
| (
| "3.5S",
| "05:03:01",
| "05:03:10",
| ["0 days 05:03:01", "0 days 05:03:04.500000", "0 days 05:03:08"],
| "3500ms",
| ),
| (
| "2.5T",
| "5 hours",
| "5 hours 8 minutes",
| [
| "0 days 05:00:00",
| "0 days 05:02:30",
| "0 days 05:05:00",
| "0 days 05:07:30",
| ],
| "150s",
| ),
| ],
| )
| def test_timedelta_range_deprecated_freq(
| self, freq_depr, start, end, expected_values, expected_freq
| ):
| # GH#52536
| msg = (
| f"'{freq_depr[-1]}' is deprecated and will be removed in a future version."
| )
|
| with tm.assert_produces_warning(FutureWarning, match=msg):
| result = timedelta_range(start=start, end=end, freq=freq_depr)
| expected = TimedeltaIndex(
| expected_values, dtype="timedelta64[ns]", freq=expected_freq
| )
| tm.assert_index_equal(result, expected)
|
|
