Python 3.13 Compatibility Blockers

[devin-ai-integration]

Python 3.13 Compatibility Investigation

Based on research in PR #337, there are two major blockers for Python 3.13 compatibility:

1. fastavro Package (1.8.2)

The package fails to build with Python 3.13 due to several C API changes:

• Use of deprecated Unicode APIs:

  • Py_UNICODE type (deprecated)
  • _PyUnicode_FastCopyCharacters (should use PyUnicode_CopyCharacters)

• Missing or changed internal C APIs:

  • _PyDict_SetItem_KnownHash undefined
  • _PyObject_NextNotImplemented undefined
  • _PyLong_AsByteArray signature change

2. requests-cache Package

This is also a blocker for Python 3.12 compatibility (see #299).

Required Steps for Python 3.13 Support

1. Track and update fastavro once they add Python 3.13 support
2. Resolve requests-cache compatibility (tracked in Third party requests-cache breaks Python 3.12 compatibility #299)
3. Re-test with Python 3.13 once both dependencies are updated

Related Links

• Research PR: ci: Do not merge: Research Python 3.13 compatibility #337 with CI failure details: https://github.com/airbytehq/airbyte-python-cdk/actions/runs/13314288230/job/37184392678?pr=337
• Python 3.12 compatibility issue: Third party requests-cache breaks Python 3.12 compatibility #299