Extend official support to Python 3.14

[PierreRaybaut]

Extending Python 3.14 Support for guidata

This document outlines the actions required to officially support Python 3.14 in the guidata library.

Checklist

• Add Python 3.14 classifier to pyproject.toml
• Add Python 3.14 to CI test matrix
• Test with Python 3.14 pre-release/release
• Verify all dependencies work with Python 3.14
• Update documentation/release notes
• Review Python 3.14 changelog for breaking changes

---

1. Update pyproject.toml

File: pyproject.toml

Add Python 3.14 Classifier

Add the Python 3.14 programming language classifier to the classifiers list:

 classifiers = [
     ...
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     ...
 ]

---

2. Update GitHub Actions Workflow

File: .github/workflows/test.yml

Add Python 3.14 to the test matrix:

     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.11", "3.13"]
+        python-version: ["3.9", "3.11", "3.13", "3.14"]

---

3. Document in Release Notes

File: doc/release_notes/release_3.XX.md (next release)

Add an entry documenting Python 3.14 support:

* Added official support for Python 3.14

---

4. Testing and Validation

Before merging, ensure the following:

Local Testing

# Install Python 3.14
# Run tests with Python 3.14
python -m pytest

Dependency Compatibility

Verify all dependencies support Python 3.14:

Dependency	Min Version	Python 3.14 Support
h5py	≥ 3.6	Check upstream
NumPy	≥ 1.22	Check upstream
QtPy	≥ 1.9	Check upstream
requests	latest	Usually compatible early
PyQt5/PyQt6	> 5.15.5	Check upstream

---

5. Breaking Changes in Python 3.14

Review Python 3.14 What's New for:

• Deprecated features removed
• New syntax or behavior changes
• Standard library modifications

Key areas to check in guidata:

• typing module changes (used throughout codebase)
• importlib changes (used in plugin loading)
• ast module changes (if used for code analysis)
• Any deprecated collections usage