alanhdu opened a new issue, #39917:
URL: https://github.com/apache/arrow/issues/39917
### Describe the enhancement requested
Right now, if you have a pyarrow array thaty ou try to `take` the empty list
on, you get:
```python
>>> import pyarrow as pa
>>> pa.array([1, 2, 3]).take([])
File
~/micromamba/envs/ctrldev/lib/python3.10/site-packages/pyarrow/array.pxi:1348,
in pyarrow.lib.Array.take()
File
~/micromamba/envs/ctrldev/lib/python3.10/site-packages/pyarrow/compute.py:473,
in take(data, indices, boundscheck, memory_pool)
433 """
434 Select values (or records) from array- or table-like data given
integer
435 selection indices.
(...)
470 ]
471 """
472 options = TakeOptions(boundscheck=boundscheck)
--> 473 return call_function('take', [data, indices], options, memory_pool)
File
~/micromamba/envs/ctrldev/lib/python3.10/site-packages/pyarrow/_compute.pyx:560,
in pyarrow._compute.call_function()
File
~/micromamba/envs/ctrldev/lib/python3.10/site-packages/pyarrow/_compute.pyx:355,
in pyarrow._compute.Function.call()
File
~/micromamba/envs/ctrldev/lib/python3.10/site-packages/pyarrow/error.pxi:144,
in pyarrow.lib.pyarrow_internal_check_status()
File
~/micromamba/envs/ctrldev/lib/python3.10/site-packages/pyarrow/error.pxi:121,
in pyarrow.lib.check_status()
ArrowNotImplementedError: Function 'array_take' has no kernel matching input
types (int64, null)
```
Would it be possible to support `take` with an empty list (and have it
return an empty array)? Otherwise, this forces us to special-case empty-lists
in our calling code, even when there's an "obvious" semantics here.
### Component(s)
Python
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