import numpy as np
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import pytest
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import pandas as pd
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import pandas._testing as tm
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def test_take(idx):
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indexer = [4, 3, 0, 2]
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result = idx.take(indexer)
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expected = idx[indexer]
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assert result.equals(expected)
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# GH 10791
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msg = "'MultiIndex' object has no attribute 'freq'"
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with pytest.raises(AttributeError, match=msg):
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idx.freq
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def test_take_invalid_kwargs(idx):
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indices = [1, 2]
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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_fill_value():
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# GH 12631
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vals = [["A", "B"], [pd.Timestamp("2011-01-01"), pd.Timestamp("2011-01-02")]]
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idx = pd.MultiIndex.from_product(vals, names=["str", "dt"])
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result = idx.take(np.array([1, 0, -1]))
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exp_vals = [
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("A", pd.Timestamp("2011-01-02")),
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("A", pd.Timestamp("2011-01-01")),
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("B", pd.Timestamp("2011-01-02")),
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]
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expected = pd.MultiIndex.from_tuples(exp_vals, names=["str", "dt"])
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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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exp_vals = [
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("A", pd.Timestamp("2011-01-02")),
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("A", pd.Timestamp("2011-01-01")),
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(np.nan, pd.NaT),
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]
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expected = pd.MultiIndex.from_tuples(exp_vals, names=["str", "dt"])
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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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exp_vals = [
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("A", pd.Timestamp("2011-01-02")),
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("A", pd.Timestamp("2011-01-01")),
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("B", pd.Timestamp("2011-01-02")),
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]
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expected = pd.MultiIndex.from_tuples(exp_vals, names=["str", "dt"])
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tm.assert_index_equal(result, expected)
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msg = "When allow_fill=True and fill_value is not None, all indices must be >= -1"
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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 4"
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with pytest.raises(IndexError, match=msg):
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idx.take(np.array([1, -5]))
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