96 lines
3.6 KiB
Python
96 lines
3.6 KiB
Python
import numpy as np
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import pytest
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from pandas import (
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Categorical,
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Index,
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)
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import pandas._testing as tm
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class TestTake:
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# https://github.com/pandas-dev/pandas/issues/20664
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def test_take_default_allow_fill(self):
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cat = Categorical(["a", "b"])
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with tm.assert_produces_warning(None):
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result = cat.take([0, -1])
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assert result.equals(cat)
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def test_take_positive_no_warning(self):
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cat = Categorical(["a", "b"])
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with tm.assert_produces_warning(None):
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cat.take([0, 0])
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def test_take_bounds(self, allow_fill):
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# https://github.com/pandas-dev/pandas/issues/20664
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cat = Categorical(["a", "b", "a"])
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if allow_fill:
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msg = "indices are out-of-bounds"
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else:
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msg = "index 4 is out of bounds for( axis 0 with)? size 3"
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with pytest.raises(IndexError, match=msg):
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cat.take([4, 5], allow_fill=allow_fill)
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def test_take_empty(self, allow_fill):
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# https://github.com/pandas-dev/pandas/issues/20664
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cat = Categorical([], categories=["a", "b"])
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if allow_fill:
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msg = "indices are out-of-bounds"
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else:
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msg = "cannot do a non-empty take from an empty axes"
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with pytest.raises(IndexError, match=msg):
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cat.take([0], allow_fill=allow_fill)
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def test_positional_take(self, ordered):
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cat = Categorical(["a", "a", "b", "b"], categories=["b", "a"], ordered=ordered)
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result = cat.take([0, 1, 2], allow_fill=False)
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expected = Categorical(
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["a", "a", "b"], categories=cat.categories, ordered=ordered
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)
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tm.assert_categorical_equal(result, expected)
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def test_positional_take_unobserved(self, ordered):
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cat = Categorical(["a", "b"], categories=["a", "b", "c"], ordered=ordered)
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result = cat.take([1, 0], allow_fill=False)
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expected = Categorical(["b", "a"], categories=cat.categories, ordered=ordered)
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tm.assert_categorical_equal(result, expected)
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def test_take_allow_fill(self):
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# https://github.com/pandas-dev/pandas/issues/23296
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cat = Categorical(["a", "a", "b"])
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result = cat.take([0, -1, -1], allow_fill=True)
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expected = Categorical(["a", np.nan, np.nan], categories=["a", "b"])
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tm.assert_categorical_equal(result, expected)
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def test_take_fill_with_negative_one(self):
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# -1 was a category
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cat = Categorical([-1, 0, 1])
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result = cat.take([0, -1, 1], allow_fill=True, fill_value=-1)
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expected = Categorical([-1, -1, 0], categories=[-1, 0, 1])
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tm.assert_categorical_equal(result, expected)
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def test_take_fill_value(self):
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# https://github.com/pandas-dev/pandas/issues/23296
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cat = Categorical(["a", "b", "c"])
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result = cat.take([0, 1, -1], fill_value="a", allow_fill=True)
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expected = Categorical(["a", "b", "a"], categories=["a", "b", "c"])
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tm.assert_categorical_equal(result, expected)
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def test_take_fill_value_new_raises(self):
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# https://github.com/pandas-dev/pandas/issues/23296
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cat = Categorical(["a", "b", "c"])
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xpr = r"Cannot setitem on a Categorical with a new category \(d\)"
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with pytest.raises(TypeError, match=xpr):
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cat.take([0, 1, -1], fill_value="d", allow_fill=True)
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def test_take_nd_deprecated(self):
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cat = Categorical(["a", "b", "c"])
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with tm.assert_produces_warning(FutureWarning):
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cat.take_nd([0, 1])
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ci = Index(cat)
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with tm.assert_produces_warning(FutureWarning):
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ci.take_nd([0, 1])
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