[ https://issues.apache.org/jira/browse/ARROW-1732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Uwe L. Korn resolved ARROW-1732. -------------------------------- Resolution: Fixed Resolved by PR #1252 > [Python] RecordBatch.from_pandas fails on DataFrame with no columns when > preserve_index=False > --------------------------------------------------------------------------------------------- > > Key: ARROW-1732 > URL: https://issues.apache.org/jira/browse/ARROW-1732 > Project: Apache Arrow > Issue Type: Bug > Components: Python > Reporter: Wes McKinney > Assignee: Wes McKinney > Labels: pull-request-available > Fix For: 0.8.0 > > > I believe this should have well-defined behavior and not raise an error: > {code} > In [5]: pa.RecordBatch.from_pandas(pd.DataFrame({}), preserve_index=False) > --------------------------------------------------------------------------- > ValueError Traceback (most recent call last) > <ipython-input-5-4dda72b47dbd> in <module>() > ----> 1 pa.RecordBatch.from_pandas(pd.DataFrame({}), preserve_index=False) > ~/code/arrow/python/pyarrow/table.pxi in pyarrow.lib.RecordBatch.from_pandas > (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:39957)() > 586 df, schema, preserve_index, nthreads=nthreads > 587 ) > --> 588 return cls.from_arrays(arrays, names, metadata) > 589 > 590 @staticmethod > ~/code/arrow/python/pyarrow/table.pxi in pyarrow.lib.RecordBatch.from_arrays > (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/lib.cxx:40130)() > 615 > 616 if not number_of_arrays: > --> 617 raise ValueError('Record batch cannot contain no arrays > (for now)') > 618 > 619 num_rows = len(arrays[0]) > ValueError: Record batch cannot contain no arrays (for now) > {code} -- This message was sent by Atlassian JIRA (v6.4.14#64029)