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- import numpy as np
- from pandas import (
- TimedeltaIndex,
- factorize,
- timedelta_range,
- )
- import pandas._testing as tm
- class TestTimedeltaIndexFactorize:
- def test_factorize(self):
- idx1 = TimedeltaIndex(["1 day", "1 day", "2 day", "2 day", "3 day", "3 day"])
- exp_arr = np.array([0, 0, 1, 1, 2, 2], dtype=np.intp)
- exp_idx = TimedeltaIndex(["1 day", "2 day", "3 day"])
- arr, idx = idx1.factorize()
- tm.assert_numpy_array_equal(arr, exp_arr)
- tm.assert_index_equal(idx, exp_idx)
- assert idx.freq == exp_idx.freq
- arr, idx = idx1.factorize(sort=True)
- tm.assert_numpy_array_equal(arr, exp_arr)
- tm.assert_index_equal(idx, exp_idx)
- assert idx.freq == exp_idx.freq
- def test_factorize_preserves_freq(self):
- # GH#38120 freq should be preserved
- idx3 = timedelta_range("1 day", periods=4, freq="s")
- exp_arr = np.array([0, 1, 2, 3], dtype=np.intp)
- arr, idx = idx3.factorize()
- tm.assert_numpy_array_equal(arr, exp_arr)
- tm.assert_index_equal(idx, idx3)
- assert idx.freq == idx3.freq
- arr, idx = factorize(idx3)
- tm.assert_numpy_array_equal(arr, exp_arr)
- tm.assert_index_equal(idx, idx3)
- assert idx.freq == idx3.freq
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