MAINT: dropping Python 3.9 support

Author: bsipocz

.github/workflows/python-tests.yml

@@ -19,21 +19,9 @@ jobs:
       # The aim with the matrix below is to walk through a representative but not full combination of OS, Python, and pytest versions.
       matrix:
         include:
-          - os: ubuntu-latest
-            python-version: '3.9'
-            toxenv: py39-test-pytestoldest
-          - os: windows-latest
-            python-version: '3.9'
-            toxenv: py39-test-pytest50
-          - os: ubuntu-latest
-            python-version: '3.9'
-            toxenv: py39-test-pytest60
-          - os: macos-latest
-            python-version: '3.9'
-            toxenv: py39-test-pytest62
           - os: ubuntu-latest
             python-version: '3.10'
-            toxenv: py310-test-pytest70
+            toxenv: py10-test-pytestoldest
           - os: ubuntu-latest
             python-version: '3.10'
             toxenv: py310-test-pytest71

setup.cfg

@@ -11,7 +11,6 @@ classifiers =
     Programming Language :: Python
     Programming Language :: Python :: 3
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
@@ -29,7 +28,7 @@ keywords = doctest, rst, pytest, py.test
 [options]
 zip_safe = False
 packages = find:
-python_requires = >=3.9
+python_requires = >=3.10
 setup_requires =
     setuptools_scm
 install_requires =

tests/test_encoding.py

@@ -2,7 +2,8 @@
 import os
 from pathlib import Path
 from textwrap import dedent
-from typing import Callable, Optional
+from typing import Optional
+from collections.abc import Callable
 
 import pytest
 
@@ -66,7 +67,7 @@ def f():
 def ini_file(testdir) -> Callable[..., Path]:
 
     def makeini(
-        encoding: Optional[str] = None,
+        encoding: str | None = None,
     ) -> Path:
         """Create a pytest.ini file with the specified encoding."""
 

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{39,310,311,312,313,314}-test
+    py{310,311,312,313,314}-test
     codestyle
 requires =
     setuptools >= 30.3.0