[jira] [Created] (ARROW-6414) pyarrow cannot (de)serialise an empty MultiIndex-ed column DataFrame

["Stpehen Gowdy (Jira)" <ji...@apache.org>]

Stpehen Gowdy created ARROW-6414:
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             Summary: pyarrow cannot (de)serialise an empty MultiIndex-ed column DataFrame
                 Key: ARROW-6414
                 URL: https://issues.apache.org/jira/browse/ARROW-6414
             Project: Apache Arrow
          Issue Type: Bug
          Components: Python
    Affects Versions: 0.14.0
            Reporter: Stpehen Gowdy


If you have an empty multiindex columns in a pandas dataframe pyarrow cannot serialise an deserialise it. Example code is below to show this.

{code:python}
import pandas as pd
import pyarrow as pa
columns = pd.MultiIndex.from_tuples([('a', 'b', 'c')])
df = pd.DataFrame(columns = columns)
df = df[[]]
pa.deserialize_pandas(pa.serialize_pandas(df).to_pybytes())
...
AttributeError: 'dict' object has no attribute 'dtype'
{code}




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