Joris Van den Bossche created ARROW-8209:
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Summary: [Python] Accessing duplicate column of Table by name
gives wrong error
Key: ARROW-8209
URL: https://issues.apache.org/jira/browse/ARROW-8209
Project: Apache Arrow
Issue Type: Bug
Components: Python
Reporter: Joris Van den Bossche
When you have a table with duplicate column names and you try to access this
column, you get an error about the column not existing:
{code}
>>> table = pa.table([pa.array([1, 2, 3]), pa.array([4, 5, 6]), pa.array([7, 8,
>>> 9])], names=['a', 'b', 'a'])
>>> table.column('a')
>>>
>>>
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
<ipython-input-6-14fad86d3142> in <module>
----> 1 table.column('a')
~/scipy/repos/arrow/python/pyarrow/table.pxi in pyarrow.lib.Table.column()
KeyError: 'Column a does not exist in table'
{code}
It should rather give an error message about the column name being duplicate.
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