850 lines
30 KiB
Python
850 lines
30 KiB
Python
from datetime import timedelta
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import numpy as np
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import pytest
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from pandas.errors import InvalidIndexError, PerformanceWarning
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import pandas as pd
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from pandas import Categorical, Index, MultiIndex, date_range
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import pandas._testing as tm
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class TestSliceLocs:
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def test_slice_locs_partial(self, idx):
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sorted_idx, _ = idx.sortlevel(0)
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result = sorted_idx.slice_locs(("foo", "two"), ("qux", "one"))
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assert result == (1, 5)
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result = sorted_idx.slice_locs(None, ("qux", "one"))
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assert result == (0, 5)
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result = sorted_idx.slice_locs(("foo", "two"), None)
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assert result == (1, len(sorted_idx))
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result = sorted_idx.slice_locs("bar", "baz")
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assert result == (2, 4)
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def test_slice_locs(self):
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df = tm.makeTimeDataFrame()
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stacked = df.stack()
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idx = stacked.index
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slob = slice(*idx.slice_locs(df.index[5], df.index[15]))
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sliced = stacked[slob]
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expected = df[5:16].stack()
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tm.assert_almost_equal(sliced.values, expected.values)
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slob = slice(
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*idx.slice_locs(
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df.index[5] + timedelta(seconds=30),
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df.index[15] - timedelta(seconds=30),
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)
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)
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sliced = stacked[slob]
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expected = df[6:15].stack()
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tm.assert_almost_equal(sliced.values, expected.values)
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def test_slice_locs_with_type_mismatch(self):
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df = tm.makeTimeDataFrame()
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stacked = df.stack()
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idx = stacked.index
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with pytest.raises(TypeError, match="^Level type mismatch"):
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idx.slice_locs((1, 3))
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with pytest.raises(TypeError, match="^Level type mismatch"):
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idx.slice_locs(df.index[5] + timedelta(seconds=30), (5, 2))
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df = tm.makeCustomDataframe(5, 5)
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stacked = df.stack()
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idx = stacked.index
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with pytest.raises(TypeError, match="^Level type mismatch"):
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idx.slice_locs(timedelta(seconds=30))
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# TODO: Try creating a UnicodeDecodeError in exception message
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with pytest.raises(TypeError, match="^Level type mismatch"):
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idx.slice_locs(df.index[1], (16, "a"))
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def test_slice_locs_not_sorted(self):
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index = MultiIndex(
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levels=[Index(np.arange(4)), Index(np.arange(4)), Index(np.arange(4))],
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codes=[
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np.array([0, 0, 1, 2, 2, 2, 3, 3]),
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np.array([0, 1, 0, 0, 0, 1, 0, 1]),
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np.array([1, 0, 1, 1, 0, 0, 1, 0]),
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],
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)
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msg = "[Kk]ey length.*greater than MultiIndex lexsort depth"
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with pytest.raises(KeyError, match=msg):
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index.slice_locs((1, 0, 1), (2, 1, 0))
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# works
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sorted_index, _ = index.sortlevel(0)
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# should there be a test case here???
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sorted_index.slice_locs((1, 0, 1), (2, 1, 0))
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def test_slice_locs_not_contained(self):
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# some searchsorted action
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index = MultiIndex(
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levels=[[0, 2, 4, 6], [0, 2, 4]],
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codes=[[0, 0, 0, 1, 1, 2, 3, 3, 3], [0, 1, 2, 1, 2, 2, 0, 1, 2]],
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)
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result = index.slice_locs((1, 0), (5, 2))
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assert result == (3, 6)
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result = index.slice_locs(1, 5)
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assert result == (3, 6)
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result = index.slice_locs((2, 2), (5, 2))
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assert result == (3, 6)
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result = index.slice_locs(2, 5)
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assert result == (3, 6)
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result = index.slice_locs((1, 0), (6, 3))
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assert result == (3, 8)
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result = index.slice_locs(-1, 10)
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assert result == (0, len(index))
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@pytest.mark.parametrize(
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"index_arr,expected,start_idx,end_idx",
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[
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([[np.nan, "a", "b"], ["c", "d", "e"]], (0, 3), np.nan, None),
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([[np.nan, "a", "b"], ["c", "d", "e"]], (0, 3), np.nan, "b"),
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([[np.nan, "a", "b"], ["c", "d", "e"]], (0, 3), np.nan, ("b", "e")),
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([["a", "b", "c"], ["d", np.nan, "e"]], (1, 3), ("b", np.nan), None),
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([["a", "b", "c"], ["d", np.nan, "e"]], (1, 3), ("b", np.nan), "c"),
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([["a", "b", "c"], ["d", np.nan, "e"]], (1, 3), ("b", np.nan), ("c", "e")),
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],
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)
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def test_slice_locs_with_missing_value(
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self, index_arr, expected, start_idx, end_idx
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):
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# issue 19132
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idx = MultiIndex.from_arrays(index_arr)
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result = idx.slice_locs(start=start_idx, end=end_idx)
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assert result == expected
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def test_putmask_with_wrong_mask(idx):
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# GH18368
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msg = "putmask: mask and data must be the same size"
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with pytest.raises(ValueError, match=msg):
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idx.putmask(np.ones(len(idx) + 1, np.bool_), 1)
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with pytest.raises(ValueError, match=msg):
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idx.putmask(np.ones(len(idx) - 1, np.bool_), 1)
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with pytest.raises(ValueError, match=msg):
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idx.putmask("foo", 1)
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class TestGetIndexer:
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def test_get_indexer(self):
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major_axis = Index(np.arange(4))
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minor_axis = Index(np.arange(2))
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major_codes = np.array([0, 0, 1, 2, 2, 3, 3], dtype=np.intp)
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minor_codes = np.array([0, 1, 0, 0, 1, 0, 1], dtype=np.intp)
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index = MultiIndex(
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levels=[major_axis, minor_axis], codes=[major_codes, minor_codes]
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)
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idx1 = index[:5]
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idx2 = index[[1, 3, 5]]
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r1 = idx1.get_indexer(idx2)
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tm.assert_almost_equal(r1, np.array([1, 3, -1], dtype=np.intp))
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r1 = idx2.get_indexer(idx1, method="pad")
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e1 = np.array([-1, 0, 0, 1, 1], dtype=np.intp)
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tm.assert_almost_equal(r1, e1)
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r2 = idx2.get_indexer(idx1[::-1], method="pad")
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tm.assert_almost_equal(r2, e1[::-1])
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rffill1 = idx2.get_indexer(idx1, method="ffill")
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tm.assert_almost_equal(r1, rffill1)
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r1 = idx2.get_indexer(idx1, method="backfill")
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e1 = np.array([0, 0, 1, 1, 2], dtype=np.intp)
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tm.assert_almost_equal(r1, e1)
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r2 = idx2.get_indexer(idx1[::-1], method="backfill")
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tm.assert_almost_equal(r2, e1[::-1])
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rbfill1 = idx2.get_indexer(idx1, method="bfill")
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tm.assert_almost_equal(r1, rbfill1)
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# pass non-MultiIndex
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r1 = idx1.get_indexer(idx2.values)
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rexp1 = idx1.get_indexer(idx2)
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tm.assert_almost_equal(r1, rexp1)
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r1 = idx1.get_indexer([1, 2, 3])
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assert (r1 == [-1, -1, -1]).all()
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# create index with duplicates
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idx1 = Index(list(range(10)) + list(range(10)))
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idx2 = Index(list(range(20)))
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msg = "Reindexing only valid with uniquely valued Index objects"
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with pytest.raises(InvalidIndexError, match=msg):
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idx1.get_indexer(idx2)
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def test_get_indexer_nearest(self):
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midx = MultiIndex.from_tuples([("a", 1), ("b", 2)])
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msg = (
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"method='nearest' not implemented yet for MultiIndex; "
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"see GitHub issue 9365"
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)
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with pytest.raises(NotImplementedError, match=msg):
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midx.get_indexer(["a"], method="nearest")
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msg = "tolerance not implemented yet for MultiIndex"
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with pytest.raises(NotImplementedError, match=msg):
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midx.get_indexer(["a"], method="pad", tolerance=2)
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def test_get_indexer_categorical_time(self):
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# https://github.com/pandas-dev/pandas/issues/21390
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midx = MultiIndex.from_product(
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[
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Categorical(["a", "b", "c"]),
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Categorical(date_range("2012-01-01", periods=3, freq="H")),
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]
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)
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result = midx.get_indexer(midx)
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tm.assert_numpy_array_equal(result, np.arange(9, dtype=np.intp))
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@pytest.mark.parametrize(
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"index_arr,labels,expected",
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[
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(
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[[1, np.nan, 2], [3, 4, 5]],
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[1, np.nan, 2],
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np.array([-1, -1, -1], dtype=np.intp),
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),
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([[1, np.nan, 2], [3, 4, 5]], [(np.nan, 4)], np.array([1], dtype=np.intp)),
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([[1, 2, 3], [np.nan, 4, 5]], [(1, np.nan)], np.array([0], dtype=np.intp)),
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(
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[[1, 2, 3], [np.nan, 4, 5]],
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[np.nan, 4, 5],
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np.array([-1, -1, -1], dtype=np.intp),
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),
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],
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)
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def test_get_indexer_with_missing_value(self, index_arr, labels, expected):
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# issue 19132
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idx = MultiIndex.from_arrays(index_arr)
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result = idx.get_indexer(labels)
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tm.assert_numpy_array_equal(result, expected)
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def test_get_indexer_methods(self):
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# https://github.com/pandas-dev/pandas/issues/29896
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# test getting an indexer for another index with different methods
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# confirms that getting an indexer without a filling method, getting an
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# indexer and backfilling, and getting an indexer and padding all behave
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# correctly in the case where all of the target values fall in between
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# several levels in the MultiIndex into which they are getting an indexer
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#
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# visually, the MultiIndexes used in this test are:
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# mult_idx_1:
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# 0: -1 0
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# 1: 2
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# 2: 3
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# 3: 4
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# 4: 0 0
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# 5: 2
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# 6: 3
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# 7: 4
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# 8: 1 0
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# 9: 2
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# 10: 3
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# 11: 4
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#
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# mult_idx_2:
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# 0: 0 1
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# 1: 3
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# 2: 4
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mult_idx_1 = MultiIndex.from_product([[-1, 0, 1], [0, 2, 3, 4]])
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mult_idx_2 = MultiIndex.from_product([[0], [1, 3, 4]])
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indexer = mult_idx_1.get_indexer(mult_idx_2)
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expected = np.array([-1, 6, 7], dtype=indexer.dtype)
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tm.assert_almost_equal(expected, indexer)
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backfill_indexer = mult_idx_1.get_indexer(mult_idx_2, method="backfill")
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expected = np.array([5, 6, 7], dtype=backfill_indexer.dtype)
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tm.assert_almost_equal(expected, backfill_indexer)
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# ensure the legacy "bfill" option functions identically to "backfill"
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backfill_indexer = mult_idx_1.get_indexer(mult_idx_2, method="bfill")
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expected = np.array([5, 6, 7], dtype=backfill_indexer.dtype)
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tm.assert_almost_equal(expected, backfill_indexer)
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pad_indexer = mult_idx_1.get_indexer(mult_idx_2, method="pad")
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expected = np.array([4, 6, 7], dtype=pad_indexer.dtype)
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tm.assert_almost_equal(expected, pad_indexer)
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# ensure the legacy "ffill" option functions identically to "pad"
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pad_indexer = mult_idx_1.get_indexer(mult_idx_2, method="ffill")
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expected = np.array([4, 6, 7], dtype=pad_indexer.dtype)
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tm.assert_almost_equal(expected, pad_indexer)
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def test_get_indexer_three_or_more_levels(self):
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# https://github.com/pandas-dev/pandas/issues/29896
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# tests get_indexer() on MultiIndexes with 3+ levels
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# visually, these are
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# mult_idx_1:
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# 0: 1 2 5
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# 1: 7
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# 2: 4 5
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# 3: 7
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# 4: 6 5
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# 5: 7
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# 6: 3 2 5
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# 7: 7
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# 8: 4 5
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# 9: 7
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# 10: 6 5
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# 11: 7
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#
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# mult_idx_2:
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# 0: 1 1 8
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# 1: 1 5 9
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# 2: 1 6 7
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# 3: 2 1 6
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# 4: 2 7 6
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# 5: 2 7 8
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# 6: 3 6 8
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mult_idx_1 = MultiIndex.from_product([[1, 3], [2, 4, 6], [5, 7]])
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mult_idx_2 = MultiIndex.from_tuples(
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[
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(1, 1, 8),
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(1, 5, 9),
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(1, 6, 7),
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(2, 1, 6),
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(2, 7, 7),
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(2, 7, 8),
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(3, 6, 8),
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]
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)
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# sanity check
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assert mult_idx_1.is_monotonic
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assert mult_idx_1.is_unique
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assert mult_idx_2.is_monotonic
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assert mult_idx_2.is_unique
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# show the relationships between the two
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assert mult_idx_2[0] < mult_idx_1[0]
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assert mult_idx_1[3] < mult_idx_2[1] < mult_idx_1[4]
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assert mult_idx_1[5] == mult_idx_2[2]
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assert mult_idx_1[5] < mult_idx_2[3] < mult_idx_1[6]
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assert mult_idx_1[5] < mult_idx_2[4] < mult_idx_1[6]
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assert mult_idx_1[5] < mult_idx_2[5] < mult_idx_1[6]
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assert mult_idx_1[-1] < mult_idx_2[6]
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indexer_no_fill = mult_idx_1.get_indexer(mult_idx_2)
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expected = np.array([-1, -1, 5, -1, -1, -1, -1], dtype=indexer_no_fill.dtype)
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tm.assert_almost_equal(expected, indexer_no_fill)
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# test with backfilling
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indexer_backfilled = mult_idx_1.get_indexer(mult_idx_2, method="backfill")
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expected = np.array([0, 4, 5, 6, 6, 6, -1], dtype=indexer_backfilled.dtype)
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tm.assert_almost_equal(expected, indexer_backfilled)
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# now, the same thing, but forward-filled (aka "padded")
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indexer_padded = mult_idx_1.get_indexer(mult_idx_2, method="pad")
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expected = np.array([-1, 3, 5, 5, 5, 5, 11], dtype=indexer_padded.dtype)
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tm.assert_almost_equal(expected, indexer_padded)
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# now, do the indexing in the other direction
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assert mult_idx_2[0] < mult_idx_1[0] < mult_idx_2[1]
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assert mult_idx_2[0] < mult_idx_1[1] < mult_idx_2[1]
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assert mult_idx_2[0] < mult_idx_1[2] < mult_idx_2[1]
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assert mult_idx_2[0] < mult_idx_1[3] < mult_idx_2[1]
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assert mult_idx_2[1] < mult_idx_1[4] < mult_idx_2[2]
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assert mult_idx_2[2] == mult_idx_1[5]
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assert mult_idx_2[5] < mult_idx_1[6] < mult_idx_2[6]
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assert mult_idx_2[5] < mult_idx_1[7] < mult_idx_2[6]
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assert mult_idx_2[5] < mult_idx_1[8] < mult_idx_2[6]
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assert mult_idx_2[5] < mult_idx_1[9] < mult_idx_2[6]
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assert mult_idx_2[5] < mult_idx_1[10] < mult_idx_2[6]
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assert mult_idx_2[5] < mult_idx_1[11] < mult_idx_2[6]
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indexer = mult_idx_2.get_indexer(mult_idx_1)
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expected = np.array(
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[-1, -1, -1, -1, -1, 2, -1, -1, -1, -1, -1, -1], dtype=indexer.dtype
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)
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tm.assert_almost_equal(expected, indexer)
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backfill_indexer = mult_idx_2.get_indexer(mult_idx_1, method="bfill")
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expected = np.array(
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[1, 1, 1, 1, 2, 2, 6, 6, 6, 6, 6, 6], dtype=backfill_indexer.dtype
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)
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tm.assert_almost_equal(expected, backfill_indexer)
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pad_indexer = mult_idx_2.get_indexer(mult_idx_1, method="pad")
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expected = np.array(
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[0, 0, 0, 0, 1, 2, 5, 5, 5, 5, 5, 5], dtype=pad_indexer.dtype
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)
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tm.assert_almost_equal(expected, pad_indexer)
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def test_get_indexer_crossing_levels(self):
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# https://github.com/pandas-dev/pandas/issues/29896
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# tests a corner case with get_indexer() with MultiIndexes where, when we
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# need to "carry" across levels, proper tuple ordering is respected
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#
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# the MultiIndexes used in this test, visually, are:
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# mult_idx_1:
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# 0: 1 1 1 1
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# 1: 2
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# 2: 2 1
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# 3: 2
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# 4: 1 2 1 1
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# 5: 2
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# 6: 2 1
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# 7: 2
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# 8: 2 1 1 1
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# 9: 2
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# 10: 2 1
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# 11: 2
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# 12: 2 2 1 1
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# 13: 2
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# 14: 2 1
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# 15: 2
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#
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# mult_idx_2:
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# 0: 1 3 2 2
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# 1: 2 3 2 2
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mult_idx_1 = MultiIndex.from_product([[1, 2]] * 4)
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mult_idx_2 = MultiIndex.from_tuples([(1, 3, 2, 2), (2, 3, 2, 2)])
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# show the tuple orderings, which get_indexer() should respect
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assert mult_idx_1[7] < mult_idx_2[0] < mult_idx_1[8]
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assert mult_idx_1[-1] < mult_idx_2[1]
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indexer = mult_idx_1.get_indexer(mult_idx_2)
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expected = np.array([-1, -1], dtype=indexer.dtype)
|
|
tm.assert_almost_equal(expected, indexer)
|
|
|
|
backfill_indexer = mult_idx_1.get_indexer(mult_idx_2, method="bfill")
|
|
expected = np.array([8, -1], dtype=backfill_indexer.dtype)
|
|
tm.assert_almost_equal(expected, backfill_indexer)
|
|
|
|
pad_indexer = mult_idx_1.get_indexer(mult_idx_2, method="ffill")
|
|
expected = np.array([7, 15], dtype=pad_indexer.dtype)
|
|
tm.assert_almost_equal(expected, pad_indexer)
|
|
|
|
|
|
def test_getitem(idx):
|
|
# scalar
|
|
assert idx[2] == ("bar", "one")
|
|
|
|
# slice
|
|
result = idx[2:5]
|
|
expected = idx[[2, 3, 4]]
|
|
assert result.equals(expected)
|
|
|
|
# boolean
|
|
result = idx[[True, False, True, False, True, True]]
|
|
result2 = idx[np.array([True, False, True, False, True, True])]
|
|
expected = idx[[0, 2, 4, 5]]
|
|
assert result.equals(expected)
|
|
assert result2.equals(expected)
|
|
|
|
|
|
def test_getitem_group_select(idx):
|
|
sorted_idx, _ = idx.sortlevel(0)
|
|
assert sorted_idx.get_loc("baz") == slice(3, 4)
|
|
assert sorted_idx.get_loc("foo") == slice(0, 2)
|
|
|
|
|
|
@pytest.mark.parametrize("ind1", [[True] * 5, Index([True] * 5)])
|
|
@pytest.mark.parametrize(
|
|
"ind2",
|
|
[[True, False, True, False, False], Index([True, False, True, False, False])],
|
|
)
|
|
def test_getitem_bool_index_all(ind1, ind2):
|
|
# GH#22533
|
|
idx = MultiIndex.from_tuples([(10, 1), (20, 2), (30, 3), (40, 4), (50, 5)])
|
|
tm.assert_index_equal(idx[ind1], idx)
|
|
|
|
expected = MultiIndex.from_tuples([(10, 1), (30, 3)])
|
|
tm.assert_index_equal(idx[ind2], expected)
|
|
|
|
|
|
@pytest.mark.parametrize("ind1", [[True], Index([True])])
|
|
@pytest.mark.parametrize("ind2", [[False], Index([False])])
|
|
def test_getitem_bool_index_single(ind1, ind2):
|
|
# GH#22533
|
|
idx = MultiIndex.from_tuples([(10, 1)])
|
|
tm.assert_index_equal(idx[ind1], idx)
|
|
|
|
expected = MultiIndex(
|
|
levels=[np.array([], dtype=np.int64), np.array([], dtype=np.int64)],
|
|
codes=[[], []],
|
|
)
|
|
tm.assert_index_equal(idx[ind2], expected)
|
|
|
|
|
|
class TestGetLoc:
|
|
def test_get_loc(self, idx):
|
|
assert idx.get_loc(("foo", "two")) == 1
|
|
assert idx.get_loc(("baz", "two")) == 3
|
|
with pytest.raises(KeyError, match=r"^10$"):
|
|
idx.get_loc(("bar", "two"))
|
|
with pytest.raises(KeyError, match=r"^'quux'$"):
|
|
idx.get_loc("quux")
|
|
|
|
msg = "only the default get_loc method is currently supported for MultiIndex"
|
|
with pytest.raises(NotImplementedError, match=msg):
|
|
idx.get_loc("foo", method="nearest")
|
|
|
|
# 3 levels
|
|
index = MultiIndex(
|
|
levels=[Index(np.arange(4)), Index(np.arange(4)), Index(np.arange(4))],
|
|
codes=[
|
|
np.array([0, 0, 1, 2, 2, 2, 3, 3]),
|
|
np.array([0, 1, 0, 0, 0, 1, 0, 1]),
|
|
np.array([1, 0, 1, 1, 0, 0, 1, 0]),
|
|
],
|
|
)
|
|
with pytest.raises(KeyError, match=r"^\(1, 1\)$"):
|
|
index.get_loc((1, 1))
|
|
assert index.get_loc((2, 0)) == slice(3, 5)
|
|
|
|
def test_get_loc_duplicates(self):
|
|
index = Index([2, 2, 2, 2])
|
|
result = index.get_loc(2)
|
|
expected = slice(0, 4)
|
|
assert result == expected
|
|
|
|
index = Index(["c", "a", "a", "b", "b"])
|
|
rs = index.get_loc("c")
|
|
xp = 0
|
|
assert rs == xp
|
|
|
|
with pytest.raises(KeyError):
|
|
index.get_loc(2)
|
|
|
|
def test_get_loc_level(self):
|
|
index = MultiIndex(
|
|
levels=[Index(np.arange(4)), Index(np.arange(4)), Index(np.arange(4))],
|
|
codes=[
|
|
np.array([0, 0, 1, 2, 2, 2, 3, 3]),
|
|
np.array([0, 1, 0, 0, 0, 1, 0, 1]),
|
|
np.array([1, 0, 1, 1, 0, 0, 1, 0]),
|
|
],
|
|
)
|
|
loc, new_index = index.get_loc_level((0, 1))
|
|
expected = slice(1, 2)
|
|
exp_index = index[expected].droplevel(0).droplevel(0)
|
|
assert loc == expected
|
|
assert new_index.equals(exp_index)
|
|
|
|
loc, new_index = index.get_loc_level((0, 1, 0))
|
|
expected = 1
|
|
assert loc == expected
|
|
assert new_index is None
|
|
|
|
with pytest.raises(KeyError, match=r"^\(2, 2\)$"):
|
|
index.get_loc_level((2, 2))
|
|
# GH 22221: unused label
|
|
with pytest.raises(KeyError, match=r"^2$"):
|
|
index.drop(2).get_loc_level(2)
|
|
# Unused label on unsorted level:
|
|
with pytest.raises(KeyError, match=r"^2$"):
|
|
index.drop(1, level=2).get_loc_level(2, level=2)
|
|
|
|
index = MultiIndex(
|
|
levels=[[2000], list(range(4))],
|
|
codes=[np.array([0, 0, 0, 0]), np.array([0, 1, 2, 3])],
|
|
)
|
|
result, new_index = index.get_loc_level((2000, slice(None, None)))
|
|
expected = slice(None, None)
|
|
assert result == expected
|
|
assert new_index.equals(index.droplevel(0))
|
|
|
|
@pytest.mark.parametrize("dtype1", [int, float, bool, str])
|
|
@pytest.mark.parametrize("dtype2", [int, float, bool, str])
|
|
def test_get_loc_multiple_dtypes(self, dtype1, dtype2):
|
|
# GH 18520
|
|
levels = [np.array([0, 1]).astype(dtype1), np.array([0, 1]).astype(dtype2)]
|
|
idx = MultiIndex.from_product(levels)
|
|
assert idx.get_loc(idx[2]) == 2
|
|
|
|
@pytest.mark.parametrize("level", [0, 1])
|
|
@pytest.mark.parametrize("dtypes", [[int, float], [float, int]])
|
|
def test_get_loc_implicit_cast(self, level, dtypes):
|
|
# GH 18818, GH 15994 : as flat index, cast int to float and vice-versa
|
|
levels = [["a", "b"], ["c", "d"]]
|
|
key = ["b", "d"]
|
|
lev_dtype, key_dtype = dtypes
|
|
levels[level] = np.array([0, 1], dtype=lev_dtype)
|
|
key[level] = key_dtype(1)
|
|
idx = MultiIndex.from_product(levels)
|
|
assert idx.get_loc(tuple(key)) == 3
|
|
|
|
def test_get_loc_cast_bool(self):
|
|
# GH 19086 : int is casted to bool, but not vice-versa
|
|
levels = [[False, True], np.arange(2, dtype="int64")]
|
|
idx = MultiIndex.from_product(levels)
|
|
|
|
assert idx.get_loc((0, 1)) == 1
|
|
assert idx.get_loc((1, 0)) == 2
|
|
|
|
with pytest.raises(KeyError, match=r"^\(False, True\)$"):
|
|
idx.get_loc((False, True))
|
|
with pytest.raises(KeyError, match=r"^\(True, False\)$"):
|
|
idx.get_loc((True, False))
|
|
|
|
@pytest.mark.parametrize("level", [0, 1])
|
|
def test_get_loc_nan(self, level, nulls_fixture):
|
|
# GH 18485 : NaN in MultiIndex
|
|
levels = [["a", "b"], ["c", "d"]]
|
|
key = ["b", "d"]
|
|
levels[level] = np.array([0, nulls_fixture], dtype=type(nulls_fixture))
|
|
key[level] = nulls_fixture
|
|
idx = MultiIndex.from_product(levels)
|
|
assert idx.get_loc(tuple(key)) == 3
|
|
|
|
def test_get_loc_missing_nan(self):
|
|
# GH 8569
|
|
idx = MultiIndex.from_arrays([[1.0, 2.0], [3.0, 4.0]])
|
|
assert isinstance(idx.get_loc(1), slice)
|
|
with pytest.raises(KeyError, match=r"^3$"):
|
|
idx.get_loc(3)
|
|
with pytest.raises(KeyError, match=r"^nan$"):
|
|
idx.get_loc(np.nan)
|
|
with pytest.raises(TypeError, match="unhashable type: 'list'"):
|
|
# listlike/non-hashable raises TypeError
|
|
idx.get_loc([np.nan])
|
|
|
|
def test_get_loc_with_values_including_missing_values(self):
|
|
# issue 19132
|
|
idx = MultiIndex.from_product([[np.nan, 1]] * 2)
|
|
expected = slice(0, 2, None)
|
|
assert idx.get_loc(np.nan) == expected
|
|
|
|
idx = MultiIndex.from_arrays([[np.nan, 1, 2, np.nan]])
|
|
expected = np.array([True, False, False, True])
|
|
tm.assert_numpy_array_equal(idx.get_loc(np.nan), expected)
|
|
|
|
idx = MultiIndex.from_product([[np.nan, 1]] * 3)
|
|
expected = slice(2, 4, None)
|
|
assert idx.get_loc((np.nan, 1)) == expected
|
|
|
|
def test_get_loc_duplicates2(self):
|
|
# TODO: de-duplicate with test_get_loc_duplicates above?
|
|
index = MultiIndex(
|
|
levels=[["D", "B", "C"], [0, 26, 27, 37, 57, 67, 75, 82]],
|
|
codes=[[0, 0, 0, 1, 2, 2, 2, 2, 2, 2], [1, 3, 4, 6, 0, 2, 2, 3, 5, 7]],
|
|
names=["tag", "day"],
|
|
)
|
|
|
|
assert index.get_loc("D") == slice(0, 3)
|
|
|
|
def test_get_loc_past_lexsort_depth(self):
|
|
# GH#30053
|
|
idx = MultiIndex(
|
|
levels=[["a"], [0, 7], [1]],
|
|
codes=[[0, 0], [1, 0], [0, 0]],
|
|
names=["x", "y", "z"],
|
|
sortorder=0,
|
|
)
|
|
key = ("a", 7)
|
|
|
|
with tm.assert_produces_warning(PerformanceWarning):
|
|
# PerformanceWarning: indexing past lexsort depth may impact performance
|
|
result = idx.get_loc(key)
|
|
|
|
assert result == slice(0, 1, None)
|
|
|
|
def test_multiindex_get_loc_list_raises(self):
|
|
# GH#35878
|
|
idx = MultiIndex.from_tuples([("a", 1), ("b", 2)])
|
|
msg = "unhashable type"
|
|
with pytest.raises(TypeError, match=msg):
|
|
idx.get_loc([])
|
|
|
|
|
|
class TestWhere:
|
|
def test_where(self):
|
|
i = MultiIndex.from_tuples([("A", 1), ("A", 2)])
|
|
|
|
msg = r"\.where is not supported for MultiIndex operations"
|
|
with pytest.raises(NotImplementedError, match=msg):
|
|
i.where(True)
|
|
|
|
@pytest.mark.parametrize("klass", [list, tuple, np.array, pd.Series])
|
|
def test_where_array_like(self, klass):
|
|
i = MultiIndex.from_tuples([("A", 1), ("A", 2)])
|
|
cond = [False, True]
|
|
msg = r"\.where is not supported for MultiIndex operations"
|
|
with pytest.raises(NotImplementedError, match=msg):
|
|
i.where(klass(cond))
|
|
|
|
|
|
class TestContains:
|
|
def test_contains_top_level(self):
|
|
midx = MultiIndex.from_product([["A", "B"], [1, 2]])
|
|
assert "A" in midx
|
|
assert "A" not in midx._engine
|
|
|
|
def test_contains_with_nat(self):
|
|
# MI with a NaT
|
|
mi = MultiIndex(
|
|
levels=[["C"], date_range("2012-01-01", periods=5)],
|
|
codes=[[0, 0, 0, 0, 0, 0], [-1, 0, 1, 2, 3, 4]],
|
|
names=[None, "B"],
|
|
)
|
|
assert ("C", pd.Timestamp("2012-01-01")) in mi
|
|
for val in mi.values:
|
|
assert val in mi
|
|
|
|
def test_contains(self, idx):
|
|
assert ("foo", "two") in idx
|
|
assert ("bar", "two") not in idx
|
|
assert None not in idx
|
|
|
|
def test_contains_with_missing_value(self):
|
|
# GH#19132
|
|
idx = MultiIndex.from_arrays([[1, np.nan, 2]])
|
|
assert np.nan in idx
|
|
|
|
idx = MultiIndex.from_arrays([[1, 2], [np.nan, 3]])
|
|
assert np.nan not in idx
|
|
assert (1, np.nan) in idx
|
|
|
|
def test_multiindex_contains_dropped(self):
|
|
# GH#19027
|
|
# test that dropped MultiIndex levels are not in the MultiIndex
|
|
# despite continuing to be in the MultiIndex's levels
|
|
idx = MultiIndex.from_product([[1, 2], [3, 4]])
|
|
assert 2 in idx
|
|
idx = idx.drop(2)
|
|
|
|
# drop implementation keeps 2 in the levels
|
|
assert 2 in idx.levels[0]
|
|
# but it should no longer be in the index itself
|
|
assert 2 not in idx
|
|
|
|
# also applies to strings
|
|
idx = MultiIndex.from_product([["a", "b"], ["c", "d"]])
|
|
assert "a" in idx
|
|
idx = idx.drop("a")
|
|
assert "a" in idx.levels[0]
|
|
assert "a" not in idx
|
|
|
|
def test_contains_td64_level(self):
|
|
# GH#24570
|
|
tx = pd.timedelta_range("09:30:00", "16:00:00", freq="30 min")
|
|
idx = MultiIndex.from_arrays([tx, np.arange(len(tx))])
|
|
assert tx[0] in idx
|
|
assert "element_not_exit" not in idx
|
|
assert "0 day 09:30:00" in idx
|
|
|
|
@pytest.mark.slow
|
|
def test_large_mi_contains(self):
|
|
# GH#10645
|
|
result = MultiIndex.from_arrays([range(10 ** 6), range(10 ** 6)])
|
|
assert not (10 ** 6, 0) in result
|
|
|
|
|
|
def test_timestamp_multiindex_indexer():
|
|
# https://github.com/pandas-dev/pandas/issues/26944
|
|
idx = MultiIndex.from_product(
|
|
[
|
|
date_range("2019-01-01T00:15:33", periods=100, freq="H", name="date"),
|
|
["x"],
|
|
[3],
|
|
]
|
|
)
|
|
df = pd.DataFrame({"foo": np.arange(len(idx))}, idx)
|
|
result = df.loc[pd.IndexSlice["2019-1-2":, "x", :], "foo"]
|
|
qidx = MultiIndex.from_product(
|
|
[
|
|
date_range(
|
|
start="2019-01-02T00:15:33",
|
|
end="2019-01-05T03:15:33",
|
|
freq="H",
|
|
name="date",
|
|
),
|
|
["x"],
|
|
[3],
|
|
]
|
|
)
|
|
should_be = pd.Series(data=np.arange(24, len(qidx) + 24), index=qidx, name="foo")
|
|
tm.assert_series_equal(result, should_be)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"index_arr,expected,target,algo",
|
|
[
|
|
([[np.nan, "a", "b"], ["c", "d", "e"]], 0, np.nan, "left"),
|
|
([[np.nan, "a", "b"], ["c", "d", "e"]], 1, (np.nan, "c"), "right"),
|
|
([["a", "b", "c"], ["d", np.nan, "d"]], 1, ("b", np.nan), "left"),
|
|
],
|
|
)
|
|
def test_get_slice_bound_with_missing_value(index_arr, expected, target, algo):
|
|
# issue 19132
|
|
idx = MultiIndex.from_arrays(index_arr)
|
|
result = idx.get_slice_bound(target, side=algo, kind="loc")
|
|
assert result == expected
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"index_arr,expected,start_idx,end_idx",
|
|
[
|
|
([[np.nan, 1, 2], [3, 4, 5]], slice(0, 2, None), np.nan, 1),
|
|
([[np.nan, 1, 2], [3, 4, 5]], slice(0, 3, None), np.nan, (2, 5)),
|
|
([[1, 2, 3], [4, np.nan, 5]], slice(1, 3, None), (2, np.nan), 3),
|
|
([[1, 2, 3], [4, np.nan, 5]], slice(1, 3, None), (2, np.nan), (3, 5)),
|
|
],
|
|
)
|
|
def test_slice_indexer_with_missing_value(index_arr, expected, start_idx, end_idx):
|
|
# issue 19132
|
|
idx = MultiIndex.from_arrays(index_arr)
|
|
result = idx.slice_indexer(start=start_idx, end=end_idx)
|
|
assert result == expected
|
|
|
|
|
|
def test_pyint_engine():
|
|
# GH#18519 : when combinations of codes cannot be represented in 64
|
|
# bits, the index underlying the MultiIndex engine works with Python
|
|
# integers, rather than uint64.
|
|
N = 5
|
|
keys = [
|
|
tuple(arr)
|
|
for arr in [
|
|
[0] * 10 * N,
|
|
[1] * 10 * N,
|
|
[2] * 10 * N,
|
|
[np.nan] * N + [2] * 9 * N,
|
|
[0] * N + [2] * 9 * N,
|
|
[np.nan] * N + [2] * 8 * N + [0] * N,
|
|
]
|
|
]
|
|
# Each level contains 4 elements (including NaN), so it is represented
|
|
# in 2 bits, for a total of 2*N*10 = 100 > 64 bits. If we were using a
|
|
# 64 bit engine and truncating the first levels, the fourth and fifth
|
|
# keys would collide; if truncating the last levels, the fifth and
|
|
# sixth; if rotating bits rather than shifting, the third and fifth.
|
|
|
|
for idx in range(len(keys)):
|
|
index = MultiIndex.from_tuples(keys)
|
|
assert index.get_loc(keys[idx]) == idx
|
|
|
|
expected = np.arange(idx + 1, dtype=np.intp)
|
|
result = index.get_indexer([keys[i] for i in expected])
|
|
tm.assert_numpy_array_equal(result, expected)
|
|
|
|
# With missing key:
|
|
idces = range(len(keys))
|
|
expected = np.array([-1] + list(idces), dtype=np.intp)
|
|
missing = tuple([0, 1] * 5 * N)
|
|
result = index.get_indexer([missing] + [keys[i] for i in idces])
|
|
tm.assert_numpy_array_equal(result, expected)
|