[ https://issues.apache.org/jira/browse/ARROW-1585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16174073#comment-16174073 ]
Wes McKinney commented on ARROW-1585: ------------------------------------- You mean integer 0 instead of {{"0"}} for the column name, though, right? {code} In [7]: df = pd.DataFrame({"0": [1, 2]}) In [8]: df.columns Out[8]: Index(['0'], dtype='object') {code} We made the decision to coerce non-string column names to strings, but we could add metadata to http://pandas-docs.github.io/pandas-docs-travis/developer.html that allows the original dtype to be recovered for the simple cases (e.g. {{Int64Index}}). cc [~cpcloud] > serialize_pandas round trip fails on integer columns > ---------------------------------------------------- > > Key: ARROW-1585 > URL: https://issues.apache.org/jira/browse/ARROW-1585 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Affects Versions: 0.7.0 > Reporter: Tom Augspurger > Priority: Minor > Fix For: 0.8.0 > > > This roundtrip fails, since the Integer column isn't converted to a string > after deserializing > {code:python} > In [1]: import pandas as pd > im > In [2]: import pyarrow as pa > In [3]: pa.deserialize_pandas(pa.serialize_pandas(pd.DataFrame({"0": [1, > 2]}))).columns > Out[3]: Index(['0'], dtype='object') > {code} > That should be an {{ Int64Index([0]) }} for the columns. -- This message was sent by Atlassian JIRA (v6.4.14#64029)