Drop Python 3.9 support

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

@@ -21,7 +21,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-        - '3.9'
         - '3.10'
         - '3.11'
         - '3.12'

docs/changelog.rst

@@ -2,6 +2,8 @@
 Changelog
 =========
 
+* Drop Python 3.9 support.
+
 4.19.0 (2025-09-18)
 -------------------
 

docs/installation.rst

@@ -4,7 +4,7 @@ Installation
 Requirements
 ------------
 
-Python 3.9 to 3.14 supported.
+Python 3.10 to 3.14 supported.
 
 Django 4.2 to 6.0 supported.
 

pyproject.toml

@@ -19,7 +19,7 @@ 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",
@@ -32,7 +32,6 @@ 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_mysql/apps.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
-from typing import Any, Callable
+from collections.abc import Callable
+from typing import Any
 
 from django.apps import AppConfig
 from django.conf import settings

src/django_mysql/cache.py

@@ -4,10 +4,10 @@
 import pickle
 import re
 import zlib
-from collections.abc import Iterable
+from collections.abc import Callable, Iterable
 from random import random
 from time import time
-from typing import Any, Callable, Literal, cast
+from typing import Any, Literal, cast
 
 from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache, default_key_func
 from django.db import connections, router

src/django_mysql/models/fields/dynamic.py

@@ -2,8 +2,8 @@
 
 import datetime as dt
 import json
-from collections.abc import Iterable
-from typing import Any, Callable, Union, cast
+from collections.abc import Callable, Iterable
+from typing import Any, cast
 
 from django.core import checks
 from django.db.backends.base.base import BaseDatabaseWrapper
@@ -38,25 +38,21 @@
 # define this type to two levels deep.
 SpecDict = dict[
     str,
-    Union[
-        type[dt.date],
-        type[dt.datetime],
-        type[float],
-        type[int],
-        type[str],
-        type[dt.time],
-        dict[
-            str,
-            Union[
-                type[dt.date],
-                type[dt.datetime],
-                type[float],
-                type[int],
-                type[str],
-                type[dt.time],
-                dict[str, Any],
-            ],
-        ],
+    type[dt.date]
+    | type[dt.datetime]
+    | type[float]
+    | type[int]
+    | type[str]
+    | type[dt.time]
+    | dict[
+        str,
+        type[dt.date]
+        | type[dt.datetime]
+        | type[float]
+        | type[int]
+        | type[str]
+        | type[dt.time]
+        | dict[str, Any],
     ],
 ]
 

src/django_mysql/models/fields/lists.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
-from collections.abc import Iterable
-from typing import Any, Callable, cast
+from collections.abc import Callable, Iterable
+from typing import Any, cast
 
 from django.core import checks
 from django.db.backends.base.base import BaseDatabaseWrapper

src/django_mysql/models/functions.py

@@ -2,7 +2,7 @@
 
 import datetime as dt
 import json
-from typing import Any, Union
+from typing import Any, TypeAlias
 
 from django.db import DEFAULT_DB_ALIAS, connections
 from django.db.backends.base.base import BaseDatabaseWrapper
@@ -18,10 +18,7 @@
 from django.db.models import Field as DjangoField
 from django.db.models.sql.compiler import SQLCompiler
 
-ExpressionArgument = Union[
-    Expression,
-    str,  # column reference handled by Django
-]
+ExpressionArgument: TypeAlias = Expression | str
 
 
 class SingleArgFunc(Func):