[WIP] chore!: Add python 3.13 support

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

@@ -4,7 +4,7 @@ inputs:
   python-version:
     description: 'Python version to use'
     required: false
-    default: "3.12"
+    default: "3.13"
 runs:
   using: "composite"
   steps:
@@ -39,12 +39,6 @@ runs:
         run: |
           make ci-install-wheel
 
-      - name: Install backports.tarfile
-        if: ${{ startsWith(inputs.python-version, '3.8') }}
-        shell: bash
-        run: |
-          uv pip install backports.tarfile
-
       - name: Pip list
         shell: bash
         run: |

.github/workflows/build-docs.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.12"]
+        python-version: ["3.13"]
       fail-fast: false
 
     steps:

.github/workflows/pytest.yaml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         # "3.10" must be a string; otherwise it is interpreted as 3.1.
-        python-version: ["3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
         os: [ubuntu-latest, windows-latest, macOS-latest]
         exclude:
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}
@@ -73,7 +73,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: "Set up Python 3.10"
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.10"
       - name: Install dependencies
@@ -107,7 +107,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
         browser: ["chromium", "firefox", "webkit"]
         exclude:
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}
@@ -117,8 +117,6 @@ jobs:
           - 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: "3.8"
           - browser: "webkit"
             python-version: "3.9"
       fail-fast: false
@@ -157,7 +155,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        python-version: ["3.12", "3.11", "3.10", "3.9"]
+        python-version: ["3.13", "3.12", "3.11", "3.10", "3.9"]
         browser: ["chromium", "firefox", "webkit"]
         exclude:
           - python-version: ${{ github.event.pull_request.draft && '3.11' }}

pyproject.toml

@@ -26,6 +26,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
 ]
 dependencies = [
     "typing-extensions>=4.10.0",
@@ -56,8 +57,8 @@ theme = ["libsass>=0.23.0"]
 test = [
     "pytest>=6.2.4",
     "pytest-asyncio>=0.17.2",
-    "pytest-playwright>=0.3.0",
-    "playwright>=1.43.0",
+    "pytest-playwright>=0.5.2",
+    "playwright>=1.48.0",
     "pytest-xdist",
     "pytest-timeout",
     "pytest-rerunfailures",

shiny/_datastructures.py

@@ -15,8 +15,6 @@ class PriorityQueueFIFO(Generic[T]):
     """
 
     def __init__(self) -> None:
-        # Using Tuple instead of tuple because in Python 3.8 and earlier, tuple isn't
-        # generic
         self._pq: PriorityQueue[tuple[int, int, T]] = PriorityQueue()
         self._counter: int = 0
 

shiny/_utils.py

@@ -72,16 +72,14 @@ def sort_keys_length(x: dict[str, T], descending: bool = False) -> dict[str, T]:
 
 
 def guess_mime_type(
-    url: "str | os.PathLike[str]",
+    url: str | os.PathLike[str],
     default: str = "application/octet-stream",
     strict: bool = True,
 ) -> str:
     """
     Guess the MIME type of a file. This is a wrapper for mimetypes.guess_type, but it
     only returns the type (and not encoding), and it allows a default value.
     """
-    # Note that in the parameters above, "os.PathLike[str]" is in quotes to avoid
-    # "TypeError: 'ABCMeta' object is not subscriptable", in Python<=3.8.
     if url:
         # Work around issue #1601, some installations of Windows 10 return text/plain
         # as the mime type for .js files
@@ -281,60 +279,6 @@ async def fn_async(*args: P.args, **kwargs: P.kwargs) -> R:
     return fn_async
 
 
-# # TODO-barret-future; Q: Keep code?
-# class WrapAsync(Generic[P, R]):
-#     """
-#     Make a function asynchronous.
-
-#     Parameters
-#     ----------
-#     fn
-#         Function to make asynchronous.
-
-#     Returns
-#     -------
-#     :
-#         Asynchronous function (within the `WrapAsync` instance)
-#     """
-
-#     def __init__(self, fn: Callable[P, R] | Callable[P, Awaitable[R]]):
-#         if isinstance(fn, WrapAsync):
-#             fn = cast(WrapAsync[P, R], fn)
-#             return fn
-#         self._is_async = is_async_callable(fn)
-#         self._fn = wrap_async(fn)
-
-#     async def __call__(self, *args: P.args, **kwargs: P.kwargs) -> R:
-#         """
-#         Call the asynchronous function.
-#         """
-#         return await self._fn(*args, **kwargs)
-
-#     @property
-#     def is_async(self) -> bool:
-#         """
-#         Was the original function asynchronous?
-
-#         Returns
-#         -------
-#         :
-#             Whether the original function is asynchronous.
-#         """
-#         return self._is_async
-
-#     @property
-#     def fn(self) -> Callable[P, R] | Callable[P, Awaitable[R]]:
-#         """
-#         Retrieve the original function
-
-#         Returns
-#         -------
-#         :
-#             Original function supplied to the `WrapAsync` constructor.
-#         """
-#         return self._fn
-
-
 # This function should generally be used in this code base instead of
 # `iscoroutinefunction()`.
 def is_async_callable(

shiny/render/_render.py

@@ -4,9 +4,6 @@
 import os
 import sys
 import typing
-
-# `typing.Dict` sed for python 3.8 compatibility
-# Can use `dict` in python >= 3.9
 from typing import TYPE_CHECKING, Any, Callable, Literal, Optional, Union, cast
 
 from htmltools import Tag, TagAttrValue, TagChild

shiny/render/renderer/_renderer.py

@@ -336,9 +336,6 @@ def _auto_register(self) -> None:
                 self._auto_registered = True
 
 
-# Not inheriting from `WrapAsync[[], IT]` as python 3.8 needs typing extensions that
-# doesn't support `[]` for a ParamSpec definition. :-( Would be minimal/clean if we
-# could do `class AsyncValueFn(WrapAsync[[], IT]):`
 class AsyncValueFn(Generic[IT]):
     """
     App-supplied output value function which returns type `IT`.

tests/pytest/test_chat.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import sys
 from datetime import datetime
 from typing import Union, cast, get_args, get_origin
 
@@ -202,10 +201,6 @@ def test_langchain_normalization():
 
 
 def test_google_normalization():
-    # Not available for Python 3.8
-    if sys.version_info < (3, 9):
-        return
-
     from google.generativeai import (  # pyright: ignore[reportMissingTypeStubs]
         GenerativeModel,
     )
@@ -362,16 +357,12 @@ def test_as_anthropic_message():
 
 
 def test_as_google_message():
-    from shiny.ui._chat_provider_types import as_google_message
-
-    # Not available for Python 3.8
-    if sys.version_info < (3, 9):
-        return
-
     from google.generativeai import (  # pyright: ignore[reportMissingTypeStubs]
         GenerativeModel,
     )
 
+    from shiny.ui._chat_provider_types import as_google_message
+
     generate_content = GenerativeModel.generate_content  # type: ignore
 
     assert generate_content.__annotations__["contents"] == "content_types.ContentsType"