Drop Python 3.9 Support (#184)

Author: sco1

.github/workflows/lint_test.yml

@@ -15,18 +15,18 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
+    - name: Set up Python
+      uses: actions/setup-python@v6
+      with:
+        python-version-file: "pyproject.toml"
+
     - name: Install uv
       uses: astral-sh/setup-uv@v6
       with:
         version: "0.8.x"
         enable-cache: true
         cache-dependency-glob: "uv.lock"
 
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version-file: "pyproject.toml"
-
     - name: Install dependencies
       run: uv sync --all-extras --dev
 
@@ -38,21 +38,19 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14-dev"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14-dev"]
       fail-fast: false
 
     steps:
     - uses: actions/checkout@v4
 
-    - name: Install uv
-      uses: astral-sh/setup-uv@v6
-      with:
-        version: "0.8.x"
-        enable-cache: true
-        cache-dependency-glob: "uv.lock"
+    - name: Get Non-Hyphenated Python Version
+      id: get-pyver
+      run: |
+        echo "PYVER=$(cut -d '-' -f 1 <<< ${{ matrix.python-version }})" >> $GITHUB_OUTPUT
 
     - name: Set up (release) Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       if: "!endsWith(matrix.python-version, '-dev')"
       with:
         python-version: ${{ matrix.python-version }}
@@ -63,13 +61,21 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        version: "0.8.x"
+        enable-cache: true
+        cache-dependency-glob: "uv.lock"
+
     - name: Install dependencies
       run: |
-        uv venv
-        uv pip install tox-gh-actions tox-uv
+        uv venv --python ${{ steps.get-pyver.outputs.PYVER }}
+        uv pip install tox-uv
 
     - name: Run tests w/tox
-      run: uv run tox
+      run: |
+        uv run tox -e ${{ steps.get-pyver.outputs.PYVER }}
 
     - name: Cache coverage for ${{ matrix.python-version }}
       uses: actions/upload-artifact@v4
@@ -87,7 +93,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version-file: "pyproject.toml"
 

.github/workflows/pypi_release.yml

@@ -26,15 +26,15 @@ jobs:
         cache-dependency-glob: "uv.lock"
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version-file: "pyproject.toml"
 
     - name: Build package
       run: uv build
 
     - name: Publish to PyPI
-      uses: pypa/gh-action-pypi-publish@release/v1.10
+      uses: pypa/gh-action-pypi-publish@release/v1.13
       with:
         print-hash: true
 

.pre-commit-config.yaml

@@ -13,7 +13,7 @@ repos:
       - id: isort
         name: isort
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
       - id: check-merge-conflict
       - id: check-toml
@@ -27,7 +27,7 @@ repos:
       - id: python-check-blanket-type-ignore
         exclude: "test_type_ignore.py"
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.12.7
+    rev: v0.12.12
     hooks:
       - id: ruff-check
   - repo: local

CONTRIBUTING.md

@@ -0,0 +1,38 @@
+# Contributing
+## Python Version Support
+A best attempt is made to support Python versions until they reach EOL, after which support will be formally dropped by the next minor or major release of this package, whichever arrives first. The status of Python versions can be found [here](https://devguide.python.org/versions/).
+
+## Development Environment
+
+Development of this project is done using the supported Python version most recently released. Note that tests are run against all supported versions of Python; see: [Testing & Coverage](#testing--coverage) for additional information.
+
+This project uses [uv](https://docs.astral.sh/uv) to manage dependencies. With your fork cloned to your local machine, you can install the project and its dependencies to create a development environment using:
+
+```text
+$ uv venv
+$ uv sync --all-extras --dev
+```
+
+A [`pre-commit`](https://pre-commit.com) configuration is also provided to create a pre-commit hook so linting errors aren't committed:
+
+```text
+$ pre-commit install
+```
+
+[`mypy`](https://mypy-lang.org/) is also used by this project to provide static type checking. It can be invoked using:
+
+```text
+$ mypy .
+```
+
+Note that `mypy` is not included as a pre-commit hook.
+
+## Testing & Coverage
+
+A [pytest](https://docs.pytest.org/en/latest/) suite is provided, with coverage reporting from [`pytest-cov`](https://github.com/pytest-dev/pytest-cov). A [`tox`](https://github.com/tox-dev/tox/) configuration is provided to test across all supported versions of Python. Testing will be skipped locally for Python versions that cannot be found; all supported versions are tested in CI.
+
+```text
+$ tox
+```
+
+Details on missing coverage, including in the test suite, is provided in the report to allow the user to generate additional tests for full coverage. Full code coverage is expected for the majority of code contributed to this project. Some exceptions are expected, primarily around code whose functionality relies on either user input or the presence of external drives; these interactions are currently not mocked, though this may change in the future.

README.md

@@ -206,31 +206,3 @@ Support is only provided for the following patterns:
   * `import typing as <alias>; foo: <alias>.Any`
 
 Nested dynamic types (e.g. `typing.Tuple[typing.Any]`) and redefinition (e.g. `from typing import Any as Foo`) will not be identified.
-
-## Contributing
-### Python Version Support
-A best attempt is made to support Python versions until they reach EOL, after which support will be formally dropped by the next minor or major release of this package, whichever arrives first. The status of Python versions can be found [here](https://devguide.python.org/versions/).
-
-### Development Environment
-This project uses [Poetry](https://python-poetry.org/) to manage dependencies. With your fork cloned to your local machine, you can install the project and its dependencies to create a development environment using:
-
-```bash
-$ poetry install
-```
-
-Note: An editable installation of `flake8-annotations` in the developer environment is required in order for the plugin to be registered for Flake8. By default, Poetry includes an editable install of the project itself when `poetry install` is invoked.
-
-A [pre-commit](https://pre-commit.com) configuration is also provided to create a pre-commit hook so linting errors aren't committed:
-
-```bash
-$ pre-commit install
-```
-
-### Testing & Coverage
-A [pytest](https://docs.pytest.org/en/latest/) suite is provided, with coverage reporting from [pytest-cov](https://github.com/pytest-dev/pytest-cov). A [tox](https://github.com/tox-dev/tox/) configuration is provided to test across all supported versions of Python. Testing will be skipped for Python versions that cannot be found.
-
-```bash
-$ tox
-```
-
-Details on missing coverage, including in the test suite, is provided in the report to allow the user to generate additional tests for full coverage.

flake8_annotations/ast_walker.py

@@ -2,8 +2,7 @@
 
 import ast
 import typing as t
-
-from attrs import define
+from dataclasses import dataclass
 
 from flake8_annotations.enums import AnnotationType, ClassDecoratorType, FunctionType
 
@@ -16,7 +15,7 @@
 AST_ARG_TYPES: t.Tuple[str, ...] = ("posonlyargs", "args", "vararg", "kwonlyargs", "kwarg")
 
 
-@define(slots=True)
+@dataclass(slots=True)
 class Argument:
     """Represent a function argument & its metadata."""
 
@@ -74,7 +73,7 @@ def _is_annotated_any(arg_expr: ast.expr) -> bool:
         return False
 
 
-@define(slots=True)
+@dataclass(slots=True)
 class Function:
     """
     Represent a function and its relevant metadata.

pyproject.toml

@@ -17,7 +17,6 @@ classifiers = [
     "Development Status :: 6 - Mature",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -29,9 +28,8 @@ classifiers = [
     "Typing :: Typed",
 ]
 
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
-    "attrs~=25.0",
     "flake8>=5.0",
 ]
 

tox.ini

@@ -15,10 +15,11 @@ exclude_lines =
     if TYPE_CHECKING:
 
 [tox]
-envlist = clean,py{39,310,311,312,313,314},cog
+envlist = clean,py{3.10,3.11,3.12,3.13,3.14},cog
 skip_missing_interpreters = True
-minversion = 4.0.0
 isolated_build = True
+requires =
+    tox >= 4.0
 
 [testenv]
 commands = python -m pytest
@@ -38,14 +39,4 @@ commands = coverage erase
 commands = cog -r README.md
 deps =
     cogapp
-    attrs
     flake8
-
-[gh-actions]  # For tox GHA
-python =
-  3.9: py39
-  3.10: py310
-  3.11: py311
-  3.12: py312
-  3.13: py313
-  3.14: py314