chore(python version): Drop Python 3.9 support and add Python 3.14 support (#2094)

Co-authored-by: Barret Schloerke <[email protected]>

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 +17,13 @@ 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 && '3.13' }}
           - 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 +108,15 @@ 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 && '3.13' }}
           - 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 +153,13 @@ 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 && '3.13' }}
           - 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 +197,6 @@ 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 +216,13 @@ 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 && '3.13' }}
           - 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",

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,

tests/pytest/asyncio_prevent.py

@@ -8,28 +8,32 @@
 in race conditions if the lock is used during the app's operation."""
 
 if __name__ == "__main__":
-    import asyncio
     import importlib
     import sys
-    from typing import Optional
 
     if "shiny" in sys.modules:
         raise RuntimeError(
-            "Bad test: shiny was already loaded, it's important that SpyEventLoopPolicy"
-            " is installed before shiny loads"
+            "Bad test: shiny was already loaded, it's important that asyncio functions"
+            " are patched before shiny loads"
         )
 
-    class SpyEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
-        def get_event_loop(self):
-            raise RuntimeError("get_event_loop called")
+    # Patch the low-level function that all asyncio operations use to access the event loop
+    # This catches all ways of accessing the event loop, not just specific functions
+    from asyncio import events
 
-        def set_event_loop(self, loop: Optional[asyncio.AbstractEventLoop]):
-            raise RuntimeError("set_event_loop called")
+    if not hasattr(events, "_get_running_loop"):
+        raise RuntimeError(
+            "asyncio.events._get_running_loop does not exist in this Python version. "
+            "This test needs to be updated for this Python version."
+        )
 
-        def new_event_loop(self):
-            raise RuntimeError("new_event_loop called")
+    def _spy_get_running_loop():
+        raise RuntimeError(
+            "Attempt to access asyncio event loop during module import. "
+            "Asyncio objects should not be created at module level."
+        )
 
-    asyncio.set_event_loop_policy(SpyEventLoopPolicy())
+    events._get_running_loop = _spy_get_running_loop  # type: ignore
 
     # Doing this instead of "import shiny" so no linter is tempted to remove it
     importlib.import_module("shiny")

tests/pytest/test_render_data_frame.py

@@ -1,4 +1,4 @@
-from typing import Any, cast
+from typing import Any, Callable, cast
 
 import pandas as pd
 import pytest
@@ -97,8 +97,6 @@ def test_as_selection_modes():
 @pytest.mark.asyncio
 async def test_as_data_frame_none():
 
-    from typing import Any, Callable
-
     async def expect_data_is_not_none_error(fn: Callable[[], Any]):
         fn_async = wrap_async(fn)
         with pytest.raises(TypeError) as e: