Drop Python 3.8 (#2543)

* Drop Python 3.8

* Run lint

Author: Kludex

.github/workflows/test-suite.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         os: [windows-latest, ubuntu-latest, macos-latest]
     steps:
       - uses: "actions/checkout@v4"

pyproject.toml

@@ -8,7 +8,7 @@ dynamic = ["version"]
 description = "The lightning-fast ASGI server."
 readme = "README.md"
 license = "BSD-3-Clause"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 authors = [
     { name = "Tom Christie", email = "[email protected]" },
     { name = "Marcelo Trylesinski", email = "[email protected]" },
@@ -20,7 +20,6 @@ classifiers = [
     "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
@@ -38,7 +37,7 @@ dependencies = [
 
 [project.optional-dependencies]
 standard = [
-    "colorama>=0.4;sys_platform == 'win32'",
+    "colorama>=0.4; sys_platform == 'win32'",
     "httptools>=0.6.3",
     "python-dotenv>=0.13",
     "PyYAML>=5.1",
@@ -127,8 +126,6 @@ py-win32 = "sys_platform == 'win32'"
 py-not-win32 = "sys_platform != 'win32'"
 py-linux = "sys_platform == 'linux'"
 py-darwin = "sys_platform == 'darwin'"
-py-gte-38 = "sys_version_info >= (3, 8)"
-py-lt-38 = "sys_version_info < (3, 8)"
 py-gte-39 = "sys_version_info >= (3, 9)"
 py-lt-39 = "sys_version_info < (3, 9)"
 py-gte-310 = "sys_version_info >= (3, 10)"

requirements.txt

@@ -20,11 +20,9 @@ pytest-mock==3.14.0
 mypy==1.13.0
 types-click==7.1.8
 types-pyyaml==6.0.12.20240917
-trustme==1.1.0; python_version < '3.9'
-trustme==1.2.0; python_version >= '3.9'
+trustme==1.2.0
 cryptography==44.0.0
-coverage==7.6.1; python_version < '3.9'
-coverage==7.6.9; python_version >= '3.9'
+coverage==7.6.9
 coverage-conditional-plugin==0.9.0
 httpx==0.28.1
 

tests/middleware/test_wsgi.py

@@ -2,7 +2,8 @@
 
 import io
 import sys
-from typing import AsyncGenerator, Callable
+from collections.abc import AsyncGenerator
+from typing import Callable
 
 import a2wsgi
 import httpx

tests/supervisors/test_reload.py

@@ -4,10 +4,11 @@
 import signal
 import socket
 import sys
+from collections.abc import Generator
 from pathlib import Path
 from threading import Thread
 from time import sleep
-from typing import Callable, Generator
+from typing import Callable
 
 import pytest
 from pytest_mock import MockerFixture

tests/test_cli.py

@@ -3,9 +3,9 @@
 import os
 import platform
 import sys
+from collections.abc import Iterator
 from pathlib import Path
 from textwrap import dedent
-from typing import Iterator
 from unittest import mock
 
 import pytest

tests/test_server.py

@@ -5,7 +5,9 @@
 import logging
 import signal
 import sys
-from typing import Callable, ContextManager, Generator
+from collections.abc import Generator
+from contextlib import AbstractContextManager
+from typing import Callable
 
 import httpx
 import pytest
@@ -62,7 +64,7 @@ async def app(scope: Scope, receive: ASGIReceiveCallable, send: ASGISendCallable
 @pytest.mark.parametrize("exception_signal", signals)
 @pytest.mark.parametrize("capture_signal", signal_captures)
 async def test_server_interrupt(
-    exception_signal: signal.Signals, capture_signal: Callable[[signal.Signals], ContextManager[None]]
+    exception_signal: signal.Signals, capture_signal: Callable[[signal.Signals], AbstractContextManager[None]]
 ):  # pragma: py-win32
     """Test interrupting a Server that is run explicitly inside asyncio"""
 

uvicorn/_types.py

@@ -32,20 +32,8 @@
 
 import sys
 import types
-from typing import (
-    Any,
-    Awaitable,
-    Callable,
-    Iterable,
-    Literal,
-    MutableMapping,
-    Optional,
-    Protocol,
-    Tuple,
-    Type,
-    TypedDict,
-    Union,
-)
+from collections.abc import Awaitable, Iterable, MutableMapping
+from typing import Any, Callable, Literal, Optional, Protocol, TypedDict, Union
 
 if sys.version_info >= (3, 11):  # pragma: py-lt-311
     from typing import NotRequired
@@ -54,8 +42,8 @@
 
 # WSGI
 Environ = MutableMapping[str, Any]
-ExcInfo = Tuple[Type[BaseException], BaseException, Optional[types.TracebackType]]
-StartResponse = Callable[[str, Iterable[Tuple[str, str]], Optional[ExcInfo]], None]
+ExcInfo = tuple[type[BaseException], BaseException, Optional[types.TracebackType]]
+StartResponse = Callable[[str, Iterable[tuple[str, str]], Optional[ExcInfo]], None]
 WSGIApp = Callable[[Environ, StartResponse], Union[Iterable[bytes], BaseException]]
 
 
@@ -281,7 +269,7 @@ def __init__(self, scope: Scope) -> None: ...  # pragma: no cover
     async def __call__(self, receive: ASGIReceiveCallable, send: ASGISendCallable) -> None: ...  # pragma: no cover
 
 
-ASGI2Application = Type[ASGI2Protocol]
+ASGI2Application = type[ASGI2Protocol]
 ASGI3Application = Callable[
     [
         Scope,

uvicorn/config.py

@@ -9,9 +9,10 @@
 import socket
 import ssl
 import sys
+from collections.abc import Awaitable
 from configparser import RawConfigParser
 from pathlib import Path
-from typing import IO, Any, Awaitable, Callable, Literal
+from typing import IO, Any, Callable, Literal
 
 import click
 

uvicorn/middleware/wsgi.py

@@ -6,7 +6,7 @@
 import sys
 import warnings
 from collections import deque
-from typing import Iterable
+from collections.abc import Iterable
 
 from uvicorn._types import (
     ASGIReceiveCallable,

uvicorn/protocols/websockets/websockets_impl.py

@@ -3,7 +3,8 @@
 import asyncio
 import http
 import logging
-from typing import Any, Literal, Optional, Sequence, cast
+from collections.abc import Sequence
+from typing import Any, Literal, Optional, cast
 from urllib.parse import unquote
 
 import websockets

uvicorn/server.py

@@ -10,9 +10,10 @@
 import sys
 import threading
 import time
+from collections.abc import Generator, Sequence
 from email.utils import formatdate
 from types import FrameType
-from typing import TYPE_CHECKING, Generator, Sequence, Union
+from typing import TYPE_CHECKING, Union
 
 import click
 
@@ -284,10 +285,7 @@ async def shutdown(self, sockets: list[socket.socket] | None = None) -> None:
                 len(self.server_state.tasks),
             )
             for t in self.server_state.tasks:
-                if sys.version_info < (3, 9):  # pragma: py-gte-39
-                    t.cancel()
-                else:  # pragma: py-lt-39
-                    t.cancel(msg="Task cancelled, timeout graceful shutdown exceeded")
+                t.cancel(msg="Task cancelled, timeout graceful shutdown exceeded")
 
         # Send the lifespan shutdown event, and wait for application shutdown.
         if not self.force_exit:

uvicorn/supervisors/basereload.py

@@ -5,10 +5,11 @@
 import signal
 import sys
 import threading
+from collections.abc import Iterator
 from pathlib import Path
 from socket import socket
 from types import FrameType
-from typing import Callable, Iterator
+from typing import Callable
 
 import click
 

uvicorn/supervisors/statreload.py

@@ -1,9 +1,10 @@
 from __future__ import annotations
 
 import logging
+from collections.abc import Iterator
 from pathlib import Path
 from socket import socket
-from typing import Callable, Iterator
+from typing import Callable
 
 from uvicorn.config import Config
 from uvicorn.supervisors.basereload import BaseReload