Drop Python 3.8 support (#1117)

Now EOL:
https://discuss.python.org/t/python-3-8-is-now-officially-eol/66983 .

.github/workflows/main.yml

@@ -19,7 +19,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-        - 3.8
         - 3.9
         - '3.10'
         - '3.11'

.pre-commit-config.yaml

@@ -39,7 +39,7 @@ repos:
   rev: v3.17.0
   hooks:
   - id: pyupgrade
-    args: [--py38-plus]
+    args: [--py39-plus]
 - repo: https://github.com/adamchainz/django-upgrade
   rev: 1.21.0
   hooks:

docs/changelog.rst

@@ -2,6 +2,8 @@
 Changelog
 =========
 
+* Drop Python 3.8 support.
+
 * Support Python 3.13.
 
 * Add testing for MariaDB 10.11 and 11.4, and MySQL 9.0.

docs/installation.rst

@@ -4,7 +4,7 @@ Installation
 Requirements
 ------------
 
-Python 3.8 to 3.13 supported.
+Python 3.9 to 3.13 supported.
 
 Django 3.2 to 5.1 supported.
 

pyproject.toml

@@ -17,7 +17,7 @@ keywords = [
 authors = [
   { name = "Adam Johnson", email = "[email protected]" },
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 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 :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",

src/django_mysql/cache.py

@@ -4,14 +4,13 @@
 import pickle
 import re
 import zlib
+from collections.abc import Iterable
 from random import random
 from textwrap import dedent
 from time import time
 from typing import Any
 from typing import Callable
-from typing import Iterable
 from typing import Literal
-from typing import Tuple
 from typing import cast
 
 from django.core.cache.backends.base import DEFAULT_TIMEOUT
@@ -98,7 +97,7 @@ def get_reverse_key_func(
             return reverse_key_func
         else:
             return cast(
-                Callable[[str], Tuple[str, str, int]],
+                Callable[[str], tuple[str, str, int]],
                 import_string(reverse_key_func),
             )
     return None

src/django_mysql/checks.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
+from collections.abc import Iterable
 from typing import Any
-from typing import Iterable
 
 from django.core import checks
 

src/django_mysql/models/expressions.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
+from collections.abc import Iterable
 from typing import Any
-from typing import Iterable
 
 from django.db.backends.base.base import BaseDatabaseWrapper
 from django.db.models import F

src/django_mysql/models/fields/dynamic.py

@@ -2,11 +2,9 @@
 
 import datetime as dt
 import json
+from collections.abc import Iterable
 from typing import Any
 from typing import Callable
-from typing import Dict
-from typing import Iterable
-from typing import Type
 from typing import Union
 from typing import cast
 
@@ -37,25 +35,25 @@
 
 # Mypy doesn't support recursive types at time of writing, but we can at least
 # define this type to two levels deep.
-SpecDict = Dict[
+SpecDict = dict[
     str,
     Union[
-        Type[dt.date],
-        Type[dt.datetime],
-        Type[float],
-        Type[int],
-        Type[str],
-        Type[dt.time],
-        Dict[
+        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, Any],
             ],
         ],
     ],

src/django_mysql/models/fields/lists.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
+from collections.abc import Iterable
 from typing import Any
 from typing import Callable
-from typing import Iterable
 from typing import cast
 
 from django.core import checks

src/django_mysql/models/lookups.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
+from collections.abc import Iterable
 from typing import Any
 from typing import Callable
-from typing import Iterable
 
 from django.db.backends.base.base import BaseDatabaseWrapper
 from django.db.models import CharField

src/django_mysql/models/query.py

@@ -4,15 +4,15 @@
 import subprocess
 import sys
 import time
+from collections.abc import Generator
 from contextlib import nullcontext
 from copy import copy
+from functools import cache
 from functools import wraps
 from typing import Any
 from typing import Callable
-from typing import Generator
 from typing import Literal
 from typing import Optional
-from typing import Tuple
 from typing import TypedDict
 from typing import TypeVar
 from typing import Union
@@ -26,7 +26,6 @@
 from django.utils.functional import cached_property
 from django.utils.translation import gettext as _
 
-from django_mysql.compat import cache
 from django_mysql.rewrite_query import REWRITE_MARKER
 from django_mysql.status import GlobalStatus
 from django_mysql.utils import StopWatch
@@ -46,7 +45,7 @@ class _CountTriesApproxDict(TypedDict):
 
 _IndexHintForType = Optional[Literal["JOIN", "ORDER BY", "GROUP BY"]]
 
-_SmartPkRangeType = Union[None, Tuple[int, int], Literal["all"]]
+_SmartPkRangeType = Union[None, tuple[int, int], Literal["all"]]
 _SmartDirectionType = Literal[-1, 1]
 
 

src/django_mysql/models/transforms.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
+from collections.abc import Iterable
 from typing import Any
-from typing import Iterable
 
 from django.db.backends.base.base import BaseDatabaseWrapper
 from django.db.models import IntegerField

src/django_mysql/status.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import time
-from typing import Iterable
+from collections.abc import Iterable
 
 from django.db import connections
 from django.db.backends.utils import CursorWrapper

src/django_mysql/typing.py

@@ -1,8 +1,6 @@
 from __future__ import annotations
 
+from collections.abc import Iterable
 from typing import Any
-from typing import Dict
-from typing import Iterable
-from typing import Tuple
 
-DeconstructResult = Tuple[str, str, Iterable[Any], Dict[str, Any]]
+DeconstructResult = tuple[str, str, Iterable[Any], dict[str, Any]]

src/django_mysql/utils.py

@@ -2,9 +2,9 @@
 
 import time
 from collections import defaultdict
+from collections.abc import Generator
 from types import TracebackType
 from typing import Any
-from typing import Generator
 
 from django.db import DEFAULT_DB_ALIAS
 from django.db import connections

tests/requirements/compile.py

@@ -23,46 +23,6 @@
     run = partial(subprocess.run, check=True)
     # mysqlclient requirements found on each version's "Databases" documentation page:
     # https://docs.djangoproject.com/en/3.0/ref/databases/#mysql-db-api-drivers
-    run(
-        [
-            *common_args,
-            "--python",
-            "3.8",
-            "--output-file",
-            "py38-django32.txt",
-        ],
-        input=b"Django>=3.2a1,<3.3\nmysqlclient>=1.4.0\n",
-    )
-    run(
-        [
-            *common_args,
-            "--python",
-            "3.8",
-            "--output-file",
-            "py38-django40.txt",
-        ],
-        input=b"Django>=4.0a1,<4.1\nmysqlclient>=1.4.0\n",
-    )
-    run(
-        [
-            *common_args,
-            "--python",
-            "3.8",
-            "--output-file",
-            "py38-django41.txt",
-        ],
-        input=b"Django>=4.1a1,<4.2\nmysqlclient>=1.4.0\n",
-    )
-    run(
-        [
-            *common_args,
-            "--python",
-            "3.8",
-            "--output-file",
-            "py38-django42.txt",
-        ],
-        input=b"Django>=4.2a1,<5.0\nmysqlclient>=1.4.3\n",
-    )
     run(
         [
             *common_args,