[CI][Python] parquet/test_encryption.py fails with NameError: name 'InMemoryKmsClient' is not defined

[raulcd]

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

Some of our nightly CI jobs have started failing with:

• example-python-minimal-build-fedora-conda
• example-python-minimal-build-ubuntu-venv
• test-conda-python-3.12-pandas-latest-numpy-latest
• test-conda-python-3.13-pandas-latest-numpy-2.1.3
• test-conda-python-3.13-pandas-latest-numpy-latest

==================================== ERRORS ====================================
_ ERROR collecting root/venv/lib/python3.12/site-packages/pyarrow/tests/parquet/test_encryption.py _
root/venv/lib/python3.12/site-packages/pyarrow/tests/parquet/test_encryption.py:683: in <module>
    def recording_kms_factory(created_configs, client_class=InMemoryKmsClient):
                                                            ^^^^^^^^^^^^^^^^^
E   NameError: name 'InMemoryKmsClient' is not defined
=========================== short test summary info ============================

This seems related to:

• GH-51349: [C++][Parquet] Add flag to control pass-through of KMS URLs from key material #51350

Component(s)

Continuous Integration, Python

[raulcd]

cc @adamreeve

[adamreeve]

@raulcd I think this should be fixed by #51457. I've reproduced the crash locally and verified it's fixed for me. But I haven't run all of the failing CI jobs in Docker.

[raulcd]

Issue resolved by pull request 51457
#51457