[ https://issues.apache.org/jira/browse/ARROW-1586?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16174067#comment-16174067 ]
Wes McKinney commented on ARROW-1586: ------------------------------------- Yes, we should preserve this metadata and add this to http://pandas-docs.github.io/pandas-docs-travis/developer.html#storing-pandas-dataframe-objects-in-apache-parquet-format. Though perhaps we can constrain the name to be a string, or coercible to a string? > [PYTHON] serialize_pandas roundtrip loses columns name > ------------------------------------------------------ > > Key: ARROW-1586 > URL: https://issues.apache.org/jira/browse/ARROW-1586 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Affects Versions: 0.7.0 > Reporter: Tom Augspurger > Priority: Minor > Fix For: 0.8.0 > > > The serialize / deserialize roundtrip loses {{ df.columns.name }} > {code:python} > In [1]: import pandas as pd > In [2]: import pyarrow as pa > In [3]: df = pd.DataFrame([[1, 2]], columns=pd.Index(['a', 'b'], > name='col_name')) > In [4]: df.columns.name > Out[4]: 'col_name' > In [5]: pa.deserialize_pandas(pa.serialize_pandas(df)).columns.name > {code} > Is this in scope for pyarrow? I suspect it would require an update to the > pandas section of the Schema metadata. -- This message was sent by Atlassian JIRA (v6.4.14#64029)