Add Python 3.14 runtime support (#672)

* Add Python 3.14 runtime support

* Bump PyTables for Python 3.14

* Use Python 3.14 in remaining workflows

Author: MaxGhenis

.github/workflows/code_changes.yaml

@@ -33,7 +33,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.13
+          python-version: 3.14
       - name: Install uv
         uses: astral-sh/setup-uv@v5
       - name: Install package
@@ -45,4 +45,4 @@ jobs:
         with:
           user: __token__
           password: ${{ secrets.PYPI }}
-          skip-existing: true
+          skip-existing: true

.github/workflows/local_area_promote.yaml

@@ -30,7 +30,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.14'
 
       - name: Install Modal CLI
         run: pip install modal

.github/workflows/local_area_publish.yaml

@@ -45,7 +45,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.14'
 
       - name: Install Modal CLI
         run: pip install modal
@@ -87,7 +87,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.14'
 
       - name: Set up uv
         uses: astral-sh/setup-uv@v5

.github/workflows/pipeline.yaml

@@ -35,7 +35,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.13"
+          python-version: "3.14"
 
       - name: Install Modal
         run: pip install modal

.github/workflows/pr_code_changes.yaml

@@ -126,7 +126,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - name: Install uv
         uses: astral-sh/setup-uv@v5
       - name: Check lock file is up-to-date
@@ -148,7 +148,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.13']
+        python-version: ['3.14']
     steps:
       - name: Checkout repo
         uses: actions/checkout@v4

.github/workflows/reusable_test.yaml

@@ -49,7 +49,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.13'
+          python-version: '3.14'
 
       - name: Set up Node.js
         uses: actions/setup-node@v4

.github/workflows/versioning.yaml

@@ -23,7 +23,7 @@ jobs:
           - name: Setup Python
             uses: actions/setup-python@v5
             with:
-              python-version: 3.12
+              python-version: 3.14
           - name: Install uv
             uses: astral-sh/setup-uv@v5
           - name: Install towncrier

changelog.d/python-314-runtime.changed.md

@@ -0,0 +1,2 @@
+Upgrade CI and Modal runtime defaults to Python 3.14 and declare package
+support for Python 3.14.

docs/README.md

@@ -5,7 +5,7 @@ This project uses [MyST Markdown](https://mystmd.org/) for documentation.
 ## Building Locally
 
 ### Requirements
-- Python 3.13+ with dev dependencies: `uv pip install -e .[dev] --system`
+- Python 3.14+ with dev dependencies: `uv pip install -e .[dev] --system`
 - Node.js 20+ (required by MyST)
 
 ### Commands

modal_app/images.py

@@ -51,7 +51,7 @@
 def _base_image(extras: list[str] | None = None):
     extra_flags = " ".join(f"--extra {e}" for e in (extras or []))
     return (
-        modal.Image.debian_slim(python_version="3.13")
+        modal.Image.debian_slim(python_version="3.14")
         .apt_install("git")
         .pip_install("uv>=0.8")
         .add_local_dir(