Drop support for running with Python 3.9

Author: cdce8p

.github/workflows/cache_ci.yaml

@@ -17,7 +17,7 @@ jobs:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       ARTIFACT_NAME: cleanup_cache
       ALL_VENV_PREFIXES: venv, venv-base, pre-commit
-      ALL_PYTHON_VERSIONS: 3.9, 3.10, 3.11, 3.12, 3.13, 3.14
+      ALL_PYTHON_VERSIONS: 3.10, 3.11, 3.12, 3.13, 3.14
     steps:
       - name: Download workflow artifact
         id: download-artifact

.github/workflows/ci.yaml

@@ -9,7 +9,7 @@ on:
 
 env:
   CACHE_VERSION: 1
-  DEFAULT_PYTHON: "3.9"
+  DEFAULT_PYTHON: "3.10"
   LIB_FOLDER: python_typing_update
   PRE_COMMIT_CACHE: ~/.cache/pre-commit
 
@@ -149,7 +149,7 @@ jobs:
     runs-on: *runs-on-ubuntu
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     outputs:
       python-key: ${{ steps.generate-python-key.outputs.key }}
     steps:

.pre-commit-config.yaml

@@ -3,7 +3,7 @@ repos:
     rev: v3.20.0
     hooks:
       - id: pyupgrade
-        args: [--py39-plus]
+        args: [--py310-plus]
         exclude: &fixtures ^tests/fixtures/.+\.py$
   - repo: https://github.com/pycqa/flake8
     rev: 7.3.0

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2024 Marc Mueller
+Copyright (c) 2025 Marc Mueller
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -133,29 +133,23 @@ Check `git diff` before committing!
 
 ### Python version options
 
-**`--py37-plus`**
-Set the minimum Python syntax version to **3.7**. (Default: **3.9**)
-
-**`--py38-plus`**  
-Set the minimum Python syntax version to **3.8**. (Default: **3.9**)
-
 **`--py39-plus`**  
-Set the minimum Python syntax version to **3.9**. This is the default.
+Set the minimum Python syntax version to **3.9**. (Default: **3.10**)
 
 **`--py310-plus`**  
-Set the minimum Python syntax version to **3.10**. (Default: **3.9**)
+Set the minimum Python syntax version to **3.10**. This is the default.
 
 **`--py311-plus`**  
-Set the minimum Python syntax version to **3.11**. (Default: **3.9**)
+Set the minimum Python syntax version to **3.11**. (Default: **3.10**)
 
 **`--py312-plus`**  
-Set the minimum Python syntax version to **3.12**. (Default: **3.9**)
+Set the minimum Python syntax version to **3.12**. (Default: **3.10**)
 
 **`--py313-plus`**
-Set the minimum Python syntax version to **3.13**. (Default: **3.9**)
+Set the minimum Python syntax version to **3.13**. (Default: **3.10**)
 
 **`--py314-plus`**
-Set the minimum Python syntax version to **3.14**. (Default: **3.9**)
+Set the minimum Python syntax version to **3.14**. (Default: **3.10**)
 
 
 ## License

pylintrc

@@ -3,7 +3,7 @@ ignore=
 load-plugins =
     pylint.extensions.typing,
     pylint.extensions.code_style,
-py-version = 3.9
+py-version = 3.10
 
 [BASIC]
 good-names =

pyproject.toml

@@ -14,15 +14,14 @@ keywords    = ["typing", "pep585", "pep604"]
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Developers",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.14",
     "Topic :: Software Development",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies    = [
     "aiofiles==25.1.0",
     "autoflake==2.3.1",
@@ -71,7 +70,7 @@ asyncio_default_fixture_loop_scope = "function"
 
 [tool.mypy]
 # https://mypy.readthedocs.io/en/stable/config_file.html
-python_version = "3.9"
+python_version = "3.10"
 show_error_codes = true
 ignore_missing_imports = true
 strict = true

python_typing_update/__main__.py

@@ -107,7 +107,7 @@ async def async_main(argv: list[str] | None = None) -> int:
     group_py_version = py_version_options.add_mutually_exclusive_group()
     group_py_version.add_argument(
         '--py37-plus',
-        action='store_const', dest='min_version', const=(3, 7), default=(3, 9),
+        action='store_const', dest='min_version', const=(3, 7), default=(3, 10),
     )
     group_py_version.add_argument(
         '--py38-plus',