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def test_multiindex_from_tuples_with_nan(self):
# GH#23578
multi_idx = MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])
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Suggested change
multi_idx = MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])
result = MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])

def test_multiindex_from_tuples_with_nan(self):
# GH#23578
multi_idx = MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])
assert isinstance(multi_idx, MultiIndex)
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Can you construct

expected = MultiIndex.from_tuples([("a", "b", "c"), (np.nan, np.nan, np.nan), ("d", "", "")])

and then call

tm.assert_index_equal_result, expected

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Done

@mroeschke mroeschke added Testing pandas testing functions or related to the test suite MultiIndex labels Apr 10, 2023

def test_multiindex_from_tuples_with_nan(self):
# GH#23578
MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])
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Suggested change
MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])
result = MultiIndex.from_tuples([("a", "b", "c"), np.nan, ("d", "", "")])

expected = MultiIndex.from_tuples(
[("a", "b", "c"), (np.nan, np.nan, np.nan), ("d", "", "")]
)
tm.assert_index_equal_result, expected
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Suggested change
tm.assert_index_equal_result, expected
tm.assert_index_equal(result, expected)

@mroeschke mroeschke added this to the 2.1 milestone Apr 10, 2023
@mroeschke mroeschke merged commit 5b66502 into pandas-dev:main Apr 10, 2023
@mroeschke
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Thanks @GrammatikakisDimitris

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API/ERR/ENH: Allow MultiIndex.from_tuples to handle NaNs

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