432 lines
13 KiB
Python
432 lines
13 KiB
Python
import numpy as np
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import pytest
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import pandas as pd
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from pandas import Index, MultiIndex, Series
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import pandas._testing as tm
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@pytest.mark.parametrize("case", [0.5, "xxx"])
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@pytest.mark.parametrize(
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"method", ["intersection", "union", "difference", "symmetric_difference"]
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)
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def test_set_ops_error_cases(idx, case, sort, method):
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# non-iterable input
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msg = "Input must be Index or array-like"
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with pytest.raises(TypeError, match=msg):
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getattr(idx, method)(case, sort=sort)
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@pytest.mark.parametrize("klass", [MultiIndex, np.array, Series, list])
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def test_intersection_base(idx, sort, klass):
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first = idx[2::-1] # first 3 elements reversed
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second = idx[:5]
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if klass is not MultiIndex:
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second = klass(second.values)
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intersect = first.intersection(second, sort=sort)
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if sort is None:
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expected = first.sort_values()
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else:
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expected = first
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tm.assert_index_equal(intersect, expected)
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msg = "other must be a MultiIndex or a list of tuples"
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with pytest.raises(TypeError, match=msg):
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first.intersection([1, 2, 3], sort=sort)
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@pytest.mark.arm_slow
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@pytest.mark.parametrize("klass", [MultiIndex, np.array, Series, list])
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def test_union_base(idx, sort, klass):
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first = idx[::-1]
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second = idx[:5]
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if klass is not MultiIndex:
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second = klass(second.values)
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union = first.union(second, sort=sort)
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if sort is None:
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expected = first.sort_values()
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else:
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expected = first
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tm.assert_index_equal(union, expected)
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msg = "other must be a MultiIndex or a list of tuples"
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with pytest.raises(TypeError, match=msg):
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first.union([1, 2, 3], sort=sort)
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def test_difference_base(idx, sort):
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second = idx[4:]
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answer = idx[:4]
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result = idx.difference(second, sort=sort)
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if sort is None:
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answer = answer.sort_values()
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assert result.equals(answer)
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tm.assert_index_equal(result, answer)
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# GH 10149
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cases = [klass(second.values) for klass in [np.array, Series, list]]
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for case in cases:
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result = idx.difference(case, sort=sort)
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tm.assert_index_equal(result, answer)
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msg = "other must be a MultiIndex or a list of tuples"
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with pytest.raises(TypeError, match=msg):
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idx.difference([1, 2, 3], sort=sort)
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def test_symmetric_difference(idx, sort):
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first = idx[1:]
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second = idx[:-1]
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answer = idx[[-1, 0]]
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result = first.symmetric_difference(second, sort=sort)
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if sort is None:
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answer = answer.sort_values()
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tm.assert_index_equal(result, answer)
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# GH 10149
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cases = [klass(second.values) for klass in [np.array, Series, list]]
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for case in cases:
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result = first.symmetric_difference(case, sort=sort)
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tm.assert_index_equal(result, answer)
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msg = "other must be a MultiIndex or a list of tuples"
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with pytest.raises(TypeError, match=msg):
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first.symmetric_difference([1, 2, 3], sort=sort)
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def test_multiindex_symmetric_difference():
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# GH 13490
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idx = MultiIndex.from_product([["a", "b"], ["A", "B"]], names=["a", "b"])
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with tm.assert_produces_warning(FutureWarning):
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result = idx ^ idx
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assert result.names == idx.names
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idx2 = idx.copy().rename(["A", "B"])
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with tm.assert_produces_warning(FutureWarning):
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result = idx ^ idx2
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assert result.names == [None, None]
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def test_empty(idx):
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# GH 15270
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assert not idx.empty
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assert idx[:0].empty
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def test_difference(idx, sort):
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first = idx
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result = first.difference(idx[-3:], sort=sort)
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vals = idx[:-3].values
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if sort is None:
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vals = sorted(vals)
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expected = MultiIndex.from_tuples(vals, sortorder=0, names=idx.names)
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assert isinstance(result, MultiIndex)
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assert result.equals(expected)
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assert result.names == idx.names
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tm.assert_index_equal(result, expected)
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# empty difference: reflexive
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result = idx.difference(idx, sort=sort)
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expected = idx[:0]
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assert result.equals(expected)
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assert result.names == idx.names
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# empty difference: superset
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result = idx[-3:].difference(idx, sort=sort)
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expected = idx[:0]
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assert result.equals(expected)
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assert result.names == idx.names
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# empty difference: degenerate
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result = idx[:0].difference(idx, sort=sort)
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expected = idx[:0]
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assert result.equals(expected)
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assert result.names == idx.names
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# names not the same
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chunklet = idx[-3:]
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chunklet.names = ["foo", "baz"]
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result = first.difference(chunklet, sort=sort)
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assert result.names == (None, None)
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# empty, but non-equal
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result = idx.difference(idx.sortlevel(1)[0], sort=sort)
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assert len(result) == 0
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# raise Exception called with non-MultiIndex
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result = first.difference(first.values, sort=sort)
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assert result.equals(first[:0])
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# name from empty array
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result = first.difference([], sort=sort)
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assert first.equals(result)
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assert first.names == result.names
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# name from non-empty array
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result = first.difference([("foo", "one")], sort=sort)
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expected = pd.MultiIndex.from_tuples(
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[("bar", "one"), ("baz", "two"), ("foo", "two"), ("qux", "one"), ("qux", "two")]
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)
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expected.names = first.names
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assert first.names == result.names
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msg = "other must be a MultiIndex or a list of tuples"
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with pytest.raises(TypeError, match=msg):
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first.difference([1, 2, 3, 4, 5], sort=sort)
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def test_difference_sort_special():
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# GH-24959
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idx = pd.MultiIndex.from_product([[1, 0], ["a", "b"]])
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# sort=None, the default
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result = idx.difference([])
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tm.assert_index_equal(result, idx)
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@pytest.mark.xfail(reason="Not implemented.")
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def test_difference_sort_special_true():
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# TODO decide on True behaviour
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idx = pd.MultiIndex.from_product([[1, 0], ["a", "b"]])
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result = idx.difference([], sort=True)
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expected = pd.MultiIndex.from_product([[0, 1], ["a", "b"]])
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tm.assert_index_equal(result, expected)
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def test_difference_sort_incomparable():
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# GH-24959
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idx = pd.MultiIndex.from_product([[1, pd.Timestamp("2000"), 2], ["a", "b"]])
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other = pd.MultiIndex.from_product([[3, pd.Timestamp("2000"), 4], ["c", "d"]])
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# sort=None, the default
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# MultiIndex.difference deviates here from other difference
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# implementations in not catching the TypeError
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msg = "'<' not supported between instances of 'Timestamp' and 'int'"
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with pytest.raises(TypeError, match=msg):
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result = idx.difference(other)
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# sort=False
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result = idx.difference(other, sort=False)
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tm.assert_index_equal(result, idx)
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@pytest.mark.xfail(reason="Not implemented.")
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def test_difference_sort_incomparable_true():
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# TODO decide on True behaviour
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# # sort=True, raises
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idx = pd.MultiIndex.from_product([[1, pd.Timestamp("2000"), 2], ["a", "b"]])
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other = pd.MultiIndex.from_product([[3, pd.Timestamp("2000"), 4], ["c", "d"]])
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with pytest.raises(TypeError):
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idx.difference(other, sort=True)
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def test_union(idx, sort):
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piece1 = idx[:5][::-1]
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piece2 = idx[3:]
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the_union = piece1.union(piece2, sort=sort)
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if sort is None:
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tm.assert_index_equal(the_union, idx.sort_values())
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assert tm.equalContents(the_union, idx)
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# corner case, pass self or empty thing:
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the_union = idx.union(idx, sort=sort)
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tm.assert_index_equal(the_union, idx)
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the_union = idx.union(idx[:0], sort=sort)
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tm.assert_index_equal(the_union, idx)
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# FIXME: dont leave commented-out
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# won't work in python 3
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# tuples = _index.values
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# result = _index[:4] | tuples[4:]
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# assert result.equals(tuples)
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# not valid for python 3
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# def test_union_with_regular_index(self):
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# other = Index(['A', 'B', 'C'])
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# result = other.union(idx)
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# assert ('foo', 'one') in result
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# assert 'B' in result
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# result2 = _index.union(other)
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# assert result.equals(result2)
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def test_intersection(idx, sort):
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piece1 = idx[:5][::-1]
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piece2 = idx[3:]
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the_int = piece1.intersection(piece2, sort=sort)
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if sort is None:
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tm.assert_index_equal(the_int, idx[3:5])
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assert tm.equalContents(the_int, idx[3:5])
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# corner case, pass self
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the_int = idx.intersection(idx, sort=sort)
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tm.assert_index_equal(the_int, idx)
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# empty intersection: disjoint
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empty = idx[:2].intersection(idx[2:], sort=sort)
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expected = idx[:0]
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assert empty.equals(expected)
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# FIXME: dont leave commented-out
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# can't do in python 3
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# tuples = _index.values
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# result = _index & tuples
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# assert result.equals(tuples)
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def test_intersection_non_object(idx, sort):
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other = Index(range(3), name="foo")
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result = idx.intersection(other, sort=sort)
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expected = MultiIndex(levels=idx.levels, codes=[[]] * idx.nlevels, names=None)
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tm.assert_index_equal(result, expected, exact=True)
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# if we pass a length-0 ndarray (i.e. no name, we retain our idx.name)
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result = idx.intersection(np.asarray(other)[:0], sort=sort)
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expected = MultiIndex(levels=idx.levels, codes=[[]] * idx.nlevels, names=idx.names)
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tm.assert_index_equal(result, expected, exact=True)
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msg = "other must be a MultiIndex or a list of tuples"
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with pytest.raises(TypeError, match=msg):
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# With non-zero length non-index, we try and fail to convert to tuples
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idx.intersection(np.asarray(other), sort=sort)
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def test_intersect_equal_sort():
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# GH-24959
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idx = pd.MultiIndex.from_product([[1, 0], ["a", "b"]])
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tm.assert_index_equal(idx.intersection(idx, sort=False), idx)
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tm.assert_index_equal(idx.intersection(idx, sort=None), idx)
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@pytest.mark.xfail(reason="Not implemented.")
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def test_intersect_equal_sort_true():
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# TODO decide on True behaviour
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idx = pd.MultiIndex.from_product([[1, 0], ["a", "b"]])
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sorted_ = pd.MultiIndex.from_product([[0, 1], ["a", "b"]])
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tm.assert_index_equal(idx.intersection(idx, sort=True), sorted_)
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@pytest.mark.parametrize("slice_", [slice(None), slice(0)])
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def test_union_sort_other_empty(slice_):
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# https://github.com/pandas-dev/pandas/issues/24959
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idx = pd.MultiIndex.from_product([[1, 0], ["a", "b"]])
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# default, sort=None
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other = idx[slice_]
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tm.assert_index_equal(idx.union(other), idx)
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# MultiIndex does not special case empty.union(idx)
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# tm.assert_index_equal(other.union(idx), idx)
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# sort=False
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tm.assert_index_equal(idx.union(other, sort=False), idx)
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@pytest.mark.xfail(reason="Not implemented.")
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def test_union_sort_other_empty_sort(slice_):
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# TODO decide on True behaviour
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# # sort=True
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idx = pd.MultiIndex.from_product([[1, 0], ["a", "b"]])
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other = idx[:0]
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result = idx.union(other, sort=True)
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expected = pd.MultiIndex.from_product([[0, 1], ["a", "b"]])
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tm.assert_index_equal(result, expected)
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def test_union_sort_other_incomparable():
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# https://github.com/pandas-dev/pandas/issues/24959
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idx = pd.MultiIndex.from_product([[1, pd.Timestamp("2000")], ["a", "b"]])
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# default, sort=None
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with tm.assert_produces_warning(RuntimeWarning):
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result = idx.union(idx[:1])
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tm.assert_index_equal(result, idx)
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# sort=False
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result = idx.union(idx[:1], sort=False)
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tm.assert_index_equal(result, idx)
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@pytest.mark.xfail(reason="Not implemented.")
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def test_union_sort_other_incomparable_sort():
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# TODO decide on True behaviour
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# # sort=True
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idx = pd.MultiIndex.from_product([[1, pd.Timestamp("2000")], ["a", "b"]])
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with pytest.raises(TypeError, match="Cannot compare"):
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idx.union(idx[:1], sort=True)
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def test_union_non_object_dtype_raises():
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# GH#32646 raise NotImplementedError instead of less-informative error
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mi = pd.MultiIndex.from_product([["a", "b"], [1, 2]])
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idx = mi.levels[1]
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msg = "Can only union MultiIndex with MultiIndex or Index of tuples"
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with pytest.raises(NotImplementedError, match=msg):
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mi.union(idx)
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@pytest.mark.parametrize(
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"method", ["union", "intersection", "difference", "symmetric_difference"]
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)
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def test_setops_disallow_true(method):
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idx1 = pd.MultiIndex.from_product([["a", "b"], [1, 2]])
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idx2 = pd.MultiIndex.from_product([["b", "c"], [1, 2]])
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with pytest.raises(ValueError, match="The 'sort' keyword only takes"):
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getattr(idx1, method)(idx2, sort=True)
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@pytest.mark.parametrize(
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("tuples", "exp_tuples"),
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[
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([("val1", "test1")], [("val1", "test1")]),
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([("val1", "test1"), ("val1", "test1")], [("val1", "test1")]),
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(
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[("val2", "test2"), ("val1", "test1")],
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[("val2", "test2"), ("val1", "test1")],
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),
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],
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)
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def test_intersect_with_duplicates(tuples, exp_tuples):
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# GH#36915
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left = MultiIndex.from_tuples(tuples, names=["first", "second"])
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right = MultiIndex.from_tuples(
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[("val1", "test1"), ("val1", "test1"), ("val2", "test2")],
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names=["first", "second"],
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)
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result = left.intersection(right)
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expected = MultiIndex.from_tuples(exp_tuples, names=["first", "second"])
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tm.assert_index_equal(result, expected)
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def test_intersection_equal_different_names():
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# GH#30302
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mi1 = MultiIndex.from_arrays([[1, 2], [3, 4]], names=["c", "b"])
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mi2 = MultiIndex.from_arrays([[1, 2], [3, 4]], names=["a", "b"])
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result = mi1.intersection(mi2)
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expected = MultiIndex.from_arrays([[1, 2], [3, 4]], names=[None, "b"])
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tm.assert_index_equal(result, expected)
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