Python 3.14 YAML Exception Compatibility Fix | Generated by AI

Home 2026.05

Test run complete. Here’s the summary:

Results: 339 passed, 1 failed (out of 340 tests)
Time:    4.25 seconds

The single failure:

FAILED tests/cloud/test_ec2.py::TestGetEc2Instances::test_unexpected_error

Root cause: In ww/cloud/ec2.py:25, the except yaml.YAMLError clause triggers a TypeError on Python 3.14 — yaml.YAMLError doesn’t inherit from BaseException on this version. The test mocks subprocess.run to raise RuntimeError("unexpected"), which isn’t caught by the existing except subprocess.CalledProcessError or except yaml.YAMLError clauses, and the latter itself blows up.

This is a Python 3.14 compatibility issue with the YAML library’s exception hierarchy. A quick fix would be to either:

  1. Add a bare except Exception clause after the existing ones, or
  2. Bump pyyaml to a version compatible with 3.14

Everything else (339 tests) passes cleanly.

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