Drop Python 3.9 support (#611)

It reached EOL on 2025-10-31:
https://peps.python.org/pep-0596/#lifespan.

Author: adamchainz

.github/ISSUE_TEMPLATE/issue.yml

@@ -6,7 +6,7 @@ body:
   attributes:
     label: Python Version
     description: Which version of Python were you using?
-    placeholder: 3.9.0
+    placeholder: 3.14.0
   validations:
     required: false
 - type: input

.github/workflows/main.yml

@@ -20,7 +20,6 @@ jobs:
     strategy:
       matrix:
         python-version:
-        - '3.9'
         - '3.10'
         - '3.11'
         - '3.12'

docs/changelog.rst

@@ -2,6 +2,8 @@
 Changelog
 =========
 
+* Drop Python 3.9 support.
+
 1.29.1 (2025-10-23)
 -------------------
 

docs/installation.rst

@@ -5,7 +5,7 @@ Installation
 Requirements
 ------------
 
-Python 3.9 to 3.14 supported.
+Python 3.10 to 3.14 supported.
 
 (Python 3.12+ is required to correctly apply fixes within f-strings.)
 

pyproject.toml

@@ -17,7 +17,7 @@ license-files = [ "LICENSE" ]
 authors = [
   { name = "Adam Johnson", email = "[email protected]" },
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
   "Development Status :: 5 - Production/Stable",
   "Framework :: Django :: 2.2",
@@ -34,7 +34,6 @@ classifiers = [
   "Natural Language :: English",
   "Operating System :: OS Independent",
   "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",

src/django_upgrade/data.py

@@ -4,9 +4,9 @@
 import pkgutil
 import re
 from collections import defaultdict
-from collections.abc import Iterable
+from collections.abc import Callable, Iterable
 from functools import cached_property
-from typing import TYPE_CHECKING, Any, Callable, TypeVar
+from typing import TYPE_CHECKING, Any, TypeVar
 
 from tokenize_rt import Offset, Token
 

tox.ini

@@ -2,7 +2,7 @@
 requires =
     tox>=4.2
 env_list =
-    py{314, 313, 312, 311, 310, 39}
+    py{314, 313, 312, 311, 310}
 
 [testenv]
 runner = uv-venv-lock-runner