mroeschke commented on issue #40538:
URL: https://github.com/apache/arrow/issues/40538#issuecomment-1997736174
Ping-ponging back here: Looks like `assume_timezone` on empty
`pa.ChunkedArray[pa.TImestampArray]` drops the empty `pa.TimestampArray`
```python
In [3]: import pyarrow as pa
In [4]: arr = pa.chunked_array([pa.array([], type=pa.timestamp("ns"))])
In [5]: arr
Out[5]:
<pyarrow.lib.ChunkedArray object at 0x10791b600>
[
[]
]
In [6]: import pyarrow.compute as pc
In [7]: pc.assume_timezone(arr, "UTC")
Out[7]:
<pyarrow.lib.ChunkedArray object at 0x10789bc40>
[
]
In [8]: pa.__version__
Out[8]: '15.0.1'
In [9]: pc.assume_timezone(arr, "UTC").chunks
Out[9]: []
In [10]: arr.chunks
Out[10]:
[<pyarrow.lib.TimestampArray object at 0x10797ee00>
[]]
```
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