chore!: drop support for Python 3.9, add support for Python 3.11

.github/workflows/_build.yaml

@@ -44,7 +44,7 @@ jobs:
         # It is recommended to pin a Runner version specifically:
         # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: ['3.9', '3.10']
+        python: ['3.10', '3.11']
     steps:
 
     - name: Harden Runner

.pre-commit-config.yaml

@@ -51,7 +51,7 @@ repos:
   - id: pyupgrade
     name: Upgrade code idioms
     files: ^src/package/|^tests/
-    args: [--py39-plus]
+    args: [--py310-plus]
 
 # Similar to pylint, with a few more/different checks. For more available
 # extensions: https://github.com/DmytroLitvinov/awesome-flake8-extensions

Makefile

@@ -56,7 +56,7 @@ endif
 .PHONY: all
 all: check test dist docs
 
-# Create a virtual environment, either for Python3.10 (default) or using
+# Create a virtual environment, either for Python3.11 (default) or using
 # the Python interpreter specified in the PYTHON environment variable. Also
 # create an empty pip.conf file to ensure that `pip config` modifies this
 # venv only, unless told otherwise. For more background, see:
@@ -70,8 +70,8 @@ venv:
 	  echo "Found an inactive Python virtual environment, please activate or nuke it" && exit 1; \
 	fi
 	if [ -z "${PYTHON}" ]; then \
-	  echo "Creating virtual environment in .venv/ for python3.10"; \
-	  python3.10 -m venv --upgrade-deps --prompt . .venv; \
+	  echo "Creating virtual environment in .venv/ for python3.11"; \
+	  python3.11 -m venv --upgrade-deps --prompt . .venv; \
 	else \
 	  echo "Creating virtual environment in .venv/ for ${PYTHON}"; \
 	  ${PYTHON} -m venv --upgrade-deps --prompt . .venv; \

README.md

@@ -31,7 +31,7 @@ The badges above give you an idea of what this project template provides. It’s
 
 ### Typing
 
-The package requires a minimum of [Python 3.9](https://www.python.org/downloads/release/python-390/) and supports [Python 3.10](https://www.python.org/downloads/release/python-3100/) as well as [Python 3.11](https://www.python.org/downloads/release/python-3110a6/). All code requires comprehensive [typing](https://docs.python.org/3/library/typing.html). The [mypy](http://mypy-lang.org/) static type checker is invoked by a git hook and through a Github Action to enforce continuous type checks. Make sure to add type hints to your code or to use [stub files](https://mypy.readthedocs.io/en/stable/stubs.html) for types, to ensure that users of your package can `import` and type-check your code (see also [PEP 561](https://www.python.org/dev/peps/pep-0561/)).
+The package requires a minimum of [Python 3.10](https://www.python.org/downloads/release/python-3109/) and supports [Python 3.11](https://www.python.org/downloads/release/python-3111/). All code requires comprehensive [typing](https://docs.python.org/3/library/typing.html). The [mypy](http://mypy-lang.org/) static type checker is invoked by a git hook and through a Github Action to enforce continuous type checks. Make sure to add type hints to your code or to use [stub files](https://mypy.readthedocs.io/en/stable/stubs.html) for types, to ensure that users of your package can `import` and type-check your code (see also [PEP 561](https://www.python.org/dev/peps/pep-0561/)).
 
 ### Quality assurance
 
@@ -104,13 +104,13 @@ make venv  # Create a new virtual environment in .venv folder using Python 3.10.
 or for a specific version of Python:
 
 ```bash
-PYTHON=python3.9 make venv  # Same virtual environment for a different Python version.
+PYTHON=python3.10 make venv  # Same virtual environment for a different Python version.
 ```
 
 or manually:
 
 ```bash
-python3.11 -m venv .venv  # Or use .venv310 for more than one local virtual environments.
+python3.11 -m venv .venv  # Or use .venv311 for more than one local virtual environments.
 ```
 
 When working with this Makefile _it is important to always [activate the virtual environment](https://docs.python.org/3/library/venv.html)_ because some of the [git hooks](#git-hooks) (see below) depend on that:

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "flit_core.buildapi"
 
 [project]
 name = "package"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 authors = [{name = "Author", email = "author@email"}]
 maintainers = [{name = "Maintainer", email = "maintainer@email"}]
 dynamic = ["version", "description"]
@@ -21,8 +21,8 @@ classifiers = [
     "Natural Language :: English",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: Implementation :: CPython",
     "Topic :: Software Development :: Libraries :: Python Modules",