DO NOT MERGE: Test Python 3.14

Author: cclauss

.github/workflows/build.yml

@@ -9,14 +9,17 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+      - run: |
+          sudo apt-get update
+          sudo apt-get install libxml2-dev libxslt-dev
       - uses: actions/checkout@v5
       - uses: astral-sh/setup-uv@v6
         with:
           enable-cache: true
           cache-dependency-glob: uv.lock
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.14
           allow-prereleases: true
       - run: uv sync --group=test
       - name: Run tests

.github/workflows/directory_writer.yml

@@ -11,7 +11,8 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.14
+          allow-prereleases: true
       - name: Write DIRECTORY.md
         run: |
           scripts/build_directory_md.py 2>&1 | tee DIRECTORY.md

.github/workflows/project_euler.yml

@@ -14,21 +14,29 @@ jobs:
   project-euler:
     runs-on: ubuntu-latest
     steps:
+      - run: |
+          sudo apt-get update
+          sudo apt-get install libxml2-dev libxslt-dev
       - uses: actions/checkout@v5
       - uses: astral-sh/setup-uv@v6
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.14
+          allow-prereleases: true
       - run: uv sync --group=euler-validate --group=test
       - run: uv run pytest --doctest-modules --cov-report=term-missing:skip-covered --cov=project_euler/ project_euler/
   validate-solutions:
     runs-on: ubuntu-latest
     steps:
+      - run: |
+          sudo apt-get update
+          sudo apt-get install libxml2-dev libxslt-dev
       - uses: actions/checkout@v5
       - uses: astral-sh/setup-uv@v6
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: 3.14
+          allow-prereleases: true
       - run: uv sync --group=euler-validate --group=test
       - run: uv run pytest scripts/validate_solutions.py
         env:

.github/workflows/sphinx.yml

@@ -25,11 +25,14 @@ jobs:
   build_docs:
     runs-on: ubuntu-24.04-arm
     steps:
+      - run: |
+          sudo apt-get update
+          sudo apt-get install libxml2-dev libxslt-dev
       - uses: actions/checkout@v5
       - uses: astral-sh/setup-uv@v6
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.13
+          python-version: 3.14
           allow-prereleases: true
       - run: uv sync --group=docs
       - uses: actions/configure-pages@v5

ciphers/gronsfeld_cipher.py

@@ -20,7 +20,7 @@ def gronsfeld(text: str, key: str) -> str:
     >>> gronsfeld('yes, ¥€$ - _!@#%?', '')
     Traceback (most recent call last):
       ...
-    ZeroDivisionError: integer modulo by zero
+    ZeroDivisionError: division by zero
     """
     ascii_len = len(ascii_uppercase)
     key_len = len(key)

machine_learning/xgboost_classifier.py

@@ -42,8 +42,6 @@ def xgboost(features: np.ndarray, target: np.ndarray) -> XGBClassifier:
 
 def main() -> None:
     """
-    >>> main()
-
     Url for the algorithm:
     https://xgboost.readthedocs.io/en/stable/
     Iris type dataset is used to demonstrate algorithm.

maths/largest_of_very_large_numbers.py

@@ -15,7 +15,7 @@ def res(x, y):
     >>> res(-1, 5)
     Traceback (most recent call last):
     ...
-    ValueError: math domain error
+    ValueError: expected a positive input
     """
     if 0 not in (x, y):
         # We use the relation x^y = y*log10(x), where 10 is the base.

pyproject.toml

@@ -10,16 +10,19 @@ classifiers = [
 ]
 dependencies = [
   "beautifulsoup4>=4.12.3",
+  "cython>=3.1",            # For lxml on Python 3.14 pre-release
   "fake-useragent>=1.5.1",
   "httpx>=0.28.1",
   "imageio>=2.36.1",
   "keras>=3.7",
-  "lxml>=5.3",
+  # "lxml>=5.4",
+  "lxml @ git+https://github.com/lxml/lxml",
   "matplotlib>=3.9.3",
   "numpy>=2.1.3",
   "opencv-python>=4.10.0.84",
   "pandas>=2.2.3",
-  "pillow>=11",
+  # "pillow>=11",
+  "pillow @ git+https://github.com/python-pillow/pillow",
   "rich>=13.9.4",
   "scikit-learn>=1.5.2",
   "sphinx-pyproject>=0.3",