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add test for setitem from duplicate axis #34071

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Merged
merged 3 commits into from
May 11, 2020
Merged

add test for setitem from duplicate axis #34071

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732fbba
add test for setitem from duplicate axis
CloseChoice May 8, 2020
19e9b08
move test to tests/indexing/test_loc.py
CloseChoice May 8, 2020
c266b45
Merge branch 'master' of https://github.com/pandas-dev/pandas into fi…
CloseChoice May 10, 2020
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13 changes: 13 additions & 0 deletions pandas/tests/indexing/test_loc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,19 @@ def test_loc_getitem_label_slice(self):
"loc", slice(2, 4, 2), typs=["mixed"], axes=0, fails=TypeError,
)

def test_setitem_from_duplicate_axis(self):
# GH#34034
df = DataFrame(
[[20, "a"], [200, "a"], [200, "a"]],
columns=["col1", "col2"],
index=[10, 1, 1],
)
df.loc[1, "col1"] = np.arange(2)
expected = DataFrame(
[[20, "a"], [0, "a"], [1, "a"]], columns=["col1", "col2"], index=[10, 1, 1]
)
tm.assert_frame_equal(df, expected)


class TestLoc2:
# TODO: better name, just separating out things that rely on base class
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