Drop Python 3.9 support and add Python 3.14 support

Update minimum required Python version to 3.10 in pyproject.toml and scripts. Add Python 3.14 to supported/tested versions in CI workflows and remove Python 3.9 from all relevant matrices and classifiers. Remove test skip logic for Python 3.9 where no longer needed.

Author: karangattu

.github/py-shiny/setup/action.yaml

@@ -4,7 +4,7 @@ inputs:
   python-version:
     description: 'Python version to use'
     required: false
-    default: "3.13"
+    default: "3.14"
 runs:
   using: "composite"
   steps:

.github/workflows/pytest.yaml

@@ -17,13 +17,14 @@ jobs:
     strategy:
       matrix:
         # "3.10" must be a string; otherwise it is interpreted as 3.1.
-        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.14", "3.13", "3.12", "3.11", "3.10"]
         os: [ubuntu-latest, windows-latest, macOS-latest]
         exclude:
+          - python-version: ${{ github.event.pull_request.draft && '3.14' }}
+          - python-version: ${{ github.event.pull_request.draft && '3.13' }}
           - python-version: ${{ github.event.pull_request.draft && '3.12' }}
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}
           - python-version: ${{ github.event.pull_request.draft && '3.10' }}
-          - python-version: ${{ github.event.pull_request.draft && '3.9' }}
           - os: ${{ github.event.pull_request.draft && 'windows-latest' }}
           - os: ${{ github.event.pull_request.draft && 'macOS-latest' }}
 
@@ -108,19 +109,16 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.14", "3.13", "3.12", "3.11", "3.10"]
         browser: ["chromium", "firefox", "webkit"]
         exclude:
+          - python-version: ${{ github.event.pull_request.draft && '3.14' }}
+          - python-version: ${{ github.event.pull_request.draft && '3.13' }}
           - python-version: ${{ github.event.pull_request.draft && '3.12' }}
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}
           - python-version: ${{ github.event.pull_request.draft && '3.10' }}
-          - python-version: ${{ github.event.pull_request.draft && '3.9' }}
           - browser: ${{ github.event.pull_request.draft && 'firefox' }}
           - browser: ${{ github.event.pull_request.draft && 'webkit' }}
-          # There are many unexplained tests that fail on webkit w/ python 3.8, 3.9
-          # Given the more recent versions of python work, we will exclude this combination
-          - browser: "webkit"
-            python-version: "3.9"
       fail-fast: false
 
     steps:
@@ -157,13 +155,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.14", "3.13", "3.12", "3.11", "3.10"]
         browser: ["chromium", "firefox", "webkit"]
         exclude:
+          - python-version: ${{ github.event.pull_request.draft && '3.14' }}
+          - python-version: ${{ github.event.pull_request.draft && '3.13' }}
           - python-version: ${{ github.event.pull_request.draft && '3.12' }}
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}
           - python-version: ${{ github.event.pull_request.draft && '3.10' }}
-          - python-version: ${{ github.event.pull_request.draft && '3.9' }}
           - browser: ${{ github.event.pull_request.draft && 'firefox' }}
           - browser: ${{ github.event.pull_request.draft && 'webkit' }}
       fail-fast: false
@@ -201,8 +200,6 @@ jobs:
           path: py-shiny-templates
 
       - name: Install py-shiny-templates dependencies
-        if: matrix.python-version != '3.9'
-        # Scikit-learn 1.7.0+ requires Python 3.10+
         run: |
           make ci-install-py-shiny-templates-deps
 
@@ -222,13 +219,14 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.14", "3.13", "3.12", "3.11", "3.10"]
         browser: ["chromium", "firefox", "webkit"]
         exclude:
+          - python-version: ${{ github.event.pull_request.draft && '3.14' }}
+          - python-version: ${{ github.event.pull_request.draft && '3.13' }}
           - python-version: ${{ github.event.pull_request.draft && '3.12' }}
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}
           - python-version: ${{ github.event.pull_request.draft && '3.10' }}
-          - python-version: ${{ github.event.pull_request.draft && '3.9' }}
           - browser: ${{ github.event.pull_request.draft && 'firefox' }}
           - browser: ${{ github.event.pull_request.draft && 'webkit' }}
       fail-fast: false

pyproject.toml

@@ -15,18 +15,18 @@ dynamic = ["version"]
 authors = [{ name = "Winston Chang", email = "[email protected]" }]
 description = "A web development framework for Python."
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 license = { text = "MIT" }
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: MIT License",
     "Natural Language :: English",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
 ]
 dependencies = [
     "typing-extensions>=4.10.0",

scripts/generate-imports.py

@@ -5,8 +5,8 @@
 from types import ModuleType
 from typing import Union, cast
 
-if sys.version_info < (3, 9):
-    raise RuntimeError("This script requires Python 3.9 or later")
+if sys.version_info < (3, 10):
+    raise RuntimeError("This script requires Python 3.10 or later")
 
 
 def gen_init_py(package_name: str) -> None:

tests/playwright/shiny/components/data_frame/pandas_compatible/test_df_pandas_compatible.py

@@ -1,16 +1,11 @@
 import re
 
 from playwright.sync_api import Page
-from utils.deploy_utils import skip_on_python_version
 
 from shiny.playwright import controller
 from shiny.run import ShinyAppProc
 
 
-@skip_on_python_version(
-    "3.9",
-    reason="Astropy (and numpy) hav difficulty loading on python 3.9. posit-dev/py-shiny#1678",
-)
 def test_data_frame_pandas_compatible(
     page: Page,
     local_app: ShinyAppProc,