Error using extension types in struct in PyArrow

[stemillington-flock]

Describe the bug, including details regarding any error messages, version, and platform.

The following code runs without problem

from pyarrow import schema, struct, field
from pyarrow import uuid

schema([
        field("col", uuid())
]).empty_table()

However when i try to move the uuid column into a struct as below

schema([
    field("parent", struct([
        field("col", uuid())
    ]))
]).empty_table()

I get the error

ArrowNotImplementedError                  Traceback (most recent call last)
Cell In[77], [line 5](vscode-notebook-cell:?execution_count=77&line=5)
      [1](vscode-notebook-cell:?execution_count=77&line=1) schema([
      [2](vscode-notebook-cell:?execution_count=77&line=2)     field("parent", struct([
      [3](vscode-notebook-cell:?execution_count=77&line=3)         field("col", uuid())
      [4](vscode-notebook-cell:?execution_count=77&line=4)     ]))
----> [5](vscode-notebook-cell:?execution_count=77&line=5) ]).empty_table()

File ~/Code/map-matching/.venv/lib/python3.12/site-packages/pyarrow/types.pxi:2988, in pyarrow.lib.Schema.empty_table()

File ~/Code/map-matching/.venv/lib/python3.12/site-packages/pyarrow/array.pxi:4791, in pyarrow.lib._empty_array()

File ~/Code/map-matching/.venv/lib/python3.12/site-packages/pyarrow/array.pxi:370, in pyarrow.lib.array()

File ~/Code/map-matching/.venv/lib/python3.12/site-packages/pyarrow/array.pxi:42, in pyarrow.lib._sequence_to_array()

File ~/Code/map-matching/.venv/lib/python3.12/site-packages/pyarrow/error.pxi:155, in pyarrow.lib.pyarrow_internal_check_status()

File ~/Code/map-matching/.venv/lib/python3.12/site-packages/pyarrow/error.pxi:92, in pyarrow.lib.check_status()

ArrowNotImplementedError: extension

This appears to happen when any extension type is moved into a struct. Using pyarrow 18.0.0 on a mac book pro M2.

Component(s)

Python