You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@arrow.apache.org by "Li Jin (JIRA)" <ji...@apache.org> on 2017/07/28 15:37:00 UTC
[jira] [Updated] (ARROW-1291) [Python] pa.RecordBatch.from_pandas
doesn't accept DataFrame with numeric column names
[ https://issues.apache.org/jira/browse/ARROW-1291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Li Jin updated ARROW-1291:
--------------------------
Component/s: Python
> [Python] pa.RecordBatch.from_pandas doesn't accept DataFrame with numeric column names
> --------------------------------------------------------------------------------------
>
> Key: ARROW-1291
> URL: https://issues.apache.org/jira/browse/ARROW-1291
> Project: Apache Arrow
> Issue Type: Bug
> Components: Python
> Affects Versions: 0.5.0
> Reporter: Li Jin
>
> {code}
> import pyarrow as pa
> import pandas as pd
> df = pd.DataFrame([1])
> pa.RecordBatch.from_pandas(df)
> {code}
> Exception:
> {code}
> TypeError Traceback (most recent call last)
> <ipython-input-5-670ba4a2ddb2> in <module>()
> 3
> 4 df = pd.DataFrame([1])
> ----> 5 pa.RecordBatch.from_pandas(df)
> table.pxi in pyarrow.lib.RecordBatch.from_pandas()
> table.pxi in pyarrow.lib._dataframe_to_arrays()
> /home/icexelloss/miniconda3/envs/spark-dev/lib/python3.5/site-packages/pyarrow/pandas_compat.py in construct_metadata(df, index_levels, preserve_index, types)
> 187 arrow_type=arrow_type
> 188 )
> --> 189 for name, arrow_type in zip(df.columns, df_types)
> 190 ] + (
> 191 [
> /home/icexelloss/miniconda3/envs/spark-dev/lib/python3.5/site-packages/pyarrow/pandas_compat.py in <listcomp>(.0)
> 187 arrow_type=arrow_type
> 188 )
> --> 189 for name, arrow_type in zip(df.columns, df_types)
> 190 ] + (
> 191 [
> /home/icexelloss/miniconda3/envs/spark-dev/lib/python3.5/site-packages/pyarrow/pandas_compat.py in get_column_metadata(column, name, arrow_type)
> 125 raise TypeError(
> 126 'Column name must be a string. Got column {} of type {}'.format(
> --> 127 name, type(name).__name__
> 128 )
> 129 )
> TypeError: Column name must be a string. Got column 0 of type int64
> {code}
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)