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BUG: new method for join with multiindex and single index (#34292) #34368

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BUG: new method for join with multiindex and single index (#34292) #34368

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3e6592f
BUG: new method for join with multiindex and single index (#34292)
CuylenE May 25, 2020
542c347
BUG: PEP8
CuylenE May 25, 2020
bdc198c
BUG: PEP8
CuylenE May 25, 2020
5d2ce41
Added test for multi and single index joins
CuylenE May 25, 2020
1336d6e
tests PEP8
CuylenE May 25, 2020
6205f0c
tests pep8
CuylenE May 25, 2020
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tests PEP8
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@CuylenE
CuylenE committed May 25, 2020
commit 1336d6eeae2c07f0b60d1d919725328e508f15d4
10 changes: 5 additions & 5 deletions pandas/tests/indexes/multi/test_join.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@

import pandas as pd
from pandas import Index, MultiIndex
import pandas._testing as tm
import pandas._testing as tm


@pytest.mark.parametrize(
Expand Down Expand Up @@ -115,23 +115,23 @@ def test_join_multi_return_indexers():
tm.assert_index_equal(result, midx1)

def test_join_multi_single():
midx = pd.MultiIndex.from_arrays([[1, 1, 3],[0, 1, 0]], names=["i", "ii"])
midx = pd.MultiIndex.from_arrays([[1, 1, 3], [0, 1, 0]], names=["i", "ii"])
idx = pd.Index([1, 2], name="i")

result = midx.join(idx, how="inner")
expected = pd.MultiIndex.from_arrays([[1, 1],[0, 1]], names=["i", "ii"])
expected = pd.MultiIndex.from_arrays([[1, 1], [0, 1]], names=["i", "ii"])
tm.assert_index_equal(result, expected)

result = midx.join(idx, how="left")
expected = midx
tm.assert_index_equal(result, midx)

result = midx.join(idx, how="right")
expected = pd.MultiIndex.from_arrays([[1, 1, 2],[0, 1, None]], names=["i", "ii"])
expected = pd.MultiIndex.from_arrays([[1, 1, 2], [0, 1, None]], names=["i", "ii"])
tm.assert_index_equal(result, expected)

result = midx.join(idx, how="outer")
expected = pd.MultiIndex.from_arrays(
[[1, 1, 2, 3],[0, 1, None, 0]], names=["i", "ii"]
[[1, 1, 2, 3], [0, 1, None, 0]], names=["i", "ii"]
)
tm.assert_index_equal(result, expected)