[ARROW-511] [Python] List[T] conversions not implemented for single arrays

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.2.0
• Component/s: Python
• External issue URL: https://github.com/apache/arrow/issues/16152
• Assignee: Uwe Korn
• Reporter: Wes McKinney
• Created: 25/Jan/17 14:41
• Updated: 11/Jan/23 07:09
• Resolved: 05/Feb/17 20:29

Description

It works for tables, though

In [2]: import pyarrow as pa

In [3]: arr = pa.from_pylist([[1,2,3], None, [1, 2], [], [4]])

In [4]: arr.to_pandas()
---------------------------------------------------------------------------
ArrowException                            Traceback (most recent call last)
<ipython-input-4-fb16f53a4747> in <module>()
----> 1 arr.to_pandas()

/home/wesm/code/arrow/python/pyarrow/array.pyx in pyarrow.array.Array.to_pandas (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/array.cxx:4271)()

/home/wesm/code/arrow/python/pyarrow/error.pyx in pyarrow.error.check_status (/home/wesm/code/arrow/python/build/temp.linux-x86_64-3.5/error.cxx:1197)()

ArrowException: NotImplemented: Arrow type reading not implemented for list<item: int64>