jorisvandenbossche commented on pull request #8952:
URL: https://github.com/apache/arrow/pull/8952#issuecomment-747582175
There is still a failure, but a different one now:
```
_________________ TestConvertMetadata.test_mixed_column_names
__________________
self = <pyarrow.tests.test_pandas.TestConvertMetadata object at
0x7f8ee85413c0>
def test_mixed_column_names(self):
# mixed type column names are not reconstructed exactly
df = pd.DataFrame({'a': [1, 2], 'b': [3, 4]})
for cols in [['あ', b'a'], [1, '2'], [1, 1.5]]:
df.columns = pd.Index(cols, dtype=object)
# assert that the from_pandas raises the warning
with pytest.warns(UserWarning):
pa.Table.from_pandas(df)
expected = df.copy()
expected.columns = df.columns.astype(str)
with pytest.warns(UserWarning):
_check_pandas_roundtrip(df, expected=expected,
> preserve_index=True)
opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/tests/test_pandas.py:422:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _
opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/tests/test_pandas.py:102:
in _check_pandas_roundtrip
else False))
pandas/_libs/testing.pyx:46: in pandas._libs.testing.assert_almost_equal
???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
_ _
> ???
E AssertionError: DataFrame.columns are different
E
E DataFrame.columns values are different (50.0 %)
E [left]: Index(['あ', 'a'], dtype='object')
E [right]: Index(['あ', 'b'a''], dtype='object')
pandas/_libs/testing.pyx:161: AssertionError
```
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