Drop Python 3.8, set Python3.9 as the minimum version. (#313)

* run pyupgrade --py39-plus ...

* format and lint aiosqlite + tests

* bump Python in the CONTRIBUTING.md

* Enforce target python version for mypy

---------

Co-authored-by: stankudrow <[email protected]>
Co-authored-by: Amethyst Reese <[email protected]>

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 ## Preparation
 
-You'll need to have at least Python 3.8 available for testing.
+You'll need to have at least Python 3.9 available for testing.
 
 You can do this with [pyenv][]:
 

aiosqlite/context.py

@@ -2,15 +2,17 @@
 # Licensed under the MIT license
 
 
+from collections.abc import Coroutine, Generator
+from contextlib import AbstractAsyncContextManager
 from functools import wraps
-from typing import Any, AsyncContextManager, Callable, Coroutine, Generator, TypeVar
+from typing import Any, Callable, TypeVar
 
 from .cursor import Cursor
 
 _T = TypeVar("_T")
 
 
-class Result(AsyncContextManager[_T], Coroutine[Any, Any, _T]):
+class Result(AbstractAsyncContextManager[_T], Coroutine[Any, Any, _T]):
     __slots__ = ("_coro", "_obj")
 
     def __init__(self, coro: Coroutine[Any, Any, _T]):

aiosqlite/core.py

@@ -8,22 +8,12 @@
 import asyncio
 import logging
 import sqlite3
+from collections.abc import AsyncIterator, Generator, Iterable
 from functools import partial
 from pathlib import Path
 from queue import Empty, Queue, SimpleQueue
 from threading import Thread
-from typing import (
-    Any,
-    AsyncIterator,
-    Callable,
-    Generator,
-    Iterable,
-    Literal,
-    Optional,
-    Tuple,
-    Type,
-    Union,
-)
+from typing import Any, Callable, Literal, Optional, Union
 from warnings import warn
 
 from .context import contextmanager
@@ -63,7 +53,7 @@ def __init__(
         self._running = True
         self._connection: Optional[sqlite3.Connection] = None
         self._connector = connector
-        self._tx: SimpleQueue[Tuple[asyncio.Future, Callable[[], Any]]] = SimpleQueue()
+        self._tx: SimpleQueue[tuple[asyncio.Future, Callable[[], Any]]] = SimpleQueue()
         self._iter_chunk_size = iter_chunk_size
 
         if loop is not None:
@@ -264,11 +254,11 @@ def isolation_level(self, value: IsolationLevel) -> None:
         self._conn.isolation_level = value
 
     @property
-    def row_factory(self) -> Optional[Type]:
+    def row_factory(self) -> Optional[type]:
         return self._conn.row_factory
 
     @row_factory.setter
-    def row_factory(self, factory: Optional[Type]) -> None:
+    def row_factory(self, factory: Optional[type]) -> None:
         self._conn.row_factory = factory
 
     @property

aiosqlite/cursor.py

@@ -2,16 +2,8 @@
 # Licensed under the MIT license
 
 import sqlite3
-from typing import (
-    Any,
-    AsyncIterator,
-    Callable,
-    Iterable,
-    Optional,
-    Tuple,
-    Type,
-    TYPE_CHECKING,
-)
+from collections.abc import AsyncIterator, Iterable
+from typing import Any, Callable, Optional, TYPE_CHECKING
 
 if TYPE_CHECKING:
     from .core import Connection
@@ -66,7 +58,7 @@ async def fetchone(self) -> Optional[sqlite3.Row]:
 
     async def fetchmany(self, size: Optional[int] = None) -> Iterable[sqlite3.Row]:
         """Fetch up to `cursor.arraysize` number of rows."""
-        args: Tuple[int, ...] = ()
+        args: tuple[int, ...] = ()
         if size is not None:
             args = (size,)
         return await self._execute(self._cursor.fetchmany, *args)
@@ -96,15 +88,15 @@ def arraysize(self, value: int) -> None:
         self._cursor.arraysize = value
 
     @property
-    def description(self) -> Tuple[Tuple[str, None, None, None, None, None, None], ...]:
+    def description(self) -> tuple[tuple[str, None, None, None, None, None, None], ...]:
         return self._cursor.description
 
     @property
     def row_factory(self) -> Optional[Callable[[sqlite3.Cursor, sqlite3.Row], object]]:
         return self._cursor.row_factory
 
     @row_factory.setter
-    def row_factory(self, factory: Optional[Type]) -> None:
+    def row_factory(self, factory: Optional[type]) -> None:
         self._cursor.row_factory = factory
 
     @property

pyproject.toml

@@ -69,6 +69,7 @@ skip_covered = true
 
 [tool.mypy]
 ignore_missing_imports = true
+python_version = "3.9"
 
 [[tool.mypy.overrides]]
 module = "aiosqlite.tests.perf"