Add isort pre-commit hook, sort imports in src and test directories

.pre-commit-config.yaml

@@ -8,8 +8,15 @@ repos:
       - id: end-of-file-fixer
       - id: check-yaml
         args: [ '--unsafe' ]
+  - repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+      - id: isort
+        name: isort (python)
+        language_version: '3.11'
+        args: ["--profile", "black", "--filter-files"]
   - repo: https://github.com/psf/black
-    rev: 22.10.0
+    rev: 23.1.0
     hooks:
       - id: black
 exclude: ^tests/snapshot_tests

src/textual/__init__.py

@@ -1,15 +1,14 @@
 from __future__ import annotations
 
 import inspect
+from typing import TYPE_CHECKING, Callable
 
 import rich.repr
 from rich.console import RenderableType
-from typing import Callable, TYPE_CHECKING
 
 from ._context import active_app
 from ._log import LogGroup, LogVerbosity
 
-
 if TYPE_CHECKING:
     from typing_extensions import TypeAlias
 

src/textual/__main__.py

@@ -1,6 +1,5 @@
 from .demo import DemoApp
 
-
 if __name__ == "__main__":
     app = DemoApp()
     app.run()

src/textual/_arrange.py

@@ -3,11 +3,11 @@ from __future__ import annotations
 from collections import defaultdict
 from fractions import Fraction
 from operator import attrgetter
-from typing import Sequence, TYPE_CHECKING
+from typing import TYPE_CHECKING, Sequence
 
-from .geometry import Region, Size, Spacing
 from ._layout import DockArrangeResult, WidgetPlacement
 from ._partition import partition
+from .geometry import Region, Size, Spacing
 
 if TYPE_CHECKING:
     from .widget import Widget

src/textual/_asyncio.py

@@ -5,7 +5,6 @@ Compatibility layer for asyncio.
 
 from __future__ import annotations
 
-
 import sys
 
 __all__ = ["create_task"]

src/textual/_border.py

@@ -1,8 +1,7 @@
 from __future__ import annotations
 
 from functools import lru_cache
-from typing import cast, Tuple, Union
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Tuple, Union, cast
 
 from rich.segment import Segment
 from rich.style import Style

src/textual/_callback.py

@@ -2,8 +2,8 @@ from __future__ import annotations
 
 import asyncio
 from functools import lru_cache
-from inspect import signature, isawaitable
-from typing import Any, Callable, TYPE_CHECKING
+from inspect import isawaitable, signature
+from typing import TYPE_CHECKING, Any, Callable
 
 from . import active_app
 

src/textual/_clock.py

@@ -2,7 +2,6 @@ import asyncio
 
 from ._time import time
 
-
 """
 A module that serves as the single source of truth for everything time-related in a Textual app.
 Having this logic centralised makes it easier to simulate time in integration tests,

src/textual/_compositor.py

@@ -25,14 +25,14 @@ from rich.style import Style
 from . import errors
 from ._cells import cell_len
 from ._loop import loop_last
-from .strip import Strip
 from .geometry import NULL_OFFSET, Offset, Region, Size
-
+from .strip import Strip
 
 if TYPE_CHECKING:
-    from .widget import Widget
     from typing_extensions import TypeAlias
 
+    from .widget import Widget
+
 
 class ReflowResult(NamedTuple):
     """The result of a reflow operation. Describes the chances to widgets."""

src/textual/_context.py

@@ -1,6 +1,5 @@
-from typing import TYPE_CHECKING
-
 from contextvars import ContextVar
+from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
     from .app import App

src/textual/_doc.py

@@ -2,14 +2,13 @@ from __future__ import annotations
 
 import hashlib
 import os
-from pathlib import Path
 import shlex
+from pathlib import Path
 from typing import Iterable
 
+from textual._import_app import import_app
 from textual.app import App
 from textual.pilot import Pilot
-from textual._import_app import import_app
-
 
 SCREENSHOT_CACHE = ".screenshot_cache"
 

src/textual/_easing.py

@@ -3,7 +3,7 @@ Define a series of easing functions for more natural-looking animations.
 Taken from https://easings.net/ and translated from JavaScript.
 """
 
-from math import pi, cos, sin, sqrt
+from math import cos, pi, sin, sqrt
 
 
 def _in_out_expo(x: float) -> float:

src/textual/_immutable_sequence_view.py

@@ -1,8 +1,9 @@
 """Provides an immutable sequence view class."""
 
 from __future__ import annotations
+
 from sys import maxsize
-from typing import Generic, TypeVar, Iterator, overload, Sequence
+from typing import Generic, Iterator, Sequence, TypeVar, overload
 
 T = TypeVar("T")
 

src/textual/_import_app.py

@@ -1,12 +1,11 @@
 from __future__ import annotations
 
 import os
-import sys
 import runpy
 import shlex
+import sys
 from pathlib import Path
-from typing import cast, TYPE_CHECKING
-
+from typing import TYPE_CHECKING, cast
 
 if TYPE_CHECKING:
     from textual.app import App
@@ -46,10 +45,10 @@ def import_app(import_name: str) -> App:
         A Textual application
     """
 
-    import inspect
     import importlib
+    import inspect
 
-    from textual.app import App, WINDOWS
+    from textual.app import WINDOWS, App
 
     import_name, *argv = shlex.split(import_name, posix=not WINDOWS)
     drive, import_name = os.path.splitdrive(import_name)

src/textual/_layout.py

@@ -1,12 +1,13 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from typing import ClassVar, NamedTuple, TYPE_CHECKING
+from typing import TYPE_CHECKING, ClassVar, NamedTuple
 
 from .geometry import Region, Size, Spacing
 
 if TYPE_CHECKING:
     from typing_extensions import TypeAlias
+
     from .widget import Widget
 
 ArrangeResult: TypeAlias = "tuple[list[WidgetPlacement], set[Widget]]"

src/textual/_node_list.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
-import sys
 
+import sys
 from typing import TYPE_CHECKING, Any, Iterator, Sequence, overload
 
 import rich.repr

src/textual/_parser.py

@@ -1,16 +1,8 @@
 from __future__ import annotations
 
-from collections import deque
 import io
-from typing import (
-    Callable,
-    Deque,
-    Generator,
-    TypeVar,
-    Generic,
-    Union,
-    Iterable,
-)
+from collections import deque
+from typing import Callable, Deque, Generator, Generic, Iterable, TypeVar, Union
 
 
 class ParseError(Exception):

src/textual/_partition.py

@@ -2,7 +2,6 @@ from __future__ import annotations
 
 from typing import Callable, Iterable, TypeVar
 
-
 T = TypeVar("T")
 
 

src/textual/_profile.py

@@ -4,8 +4,8 @@ Timer context manager, only used in debug.
 """
 
 import contextlib
-from typing import Generator
 from time import perf_counter
+from typing import Generator
 
 from . import log
 

src/textual/_resolve.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from fractions import Fraction
 from itertools import accumulate
-from typing import Sequence, cast, TYPE_CHECKING
+from typing import TYPE_CHECKING, Sequence, cast
 
 from typing_extensions import Literal
 

src/textual/_sleep.py

@@ -1,9 +1,8 @@
 from __future__ import annotations
 
-
-from time import sleep, perf_counter
-from asyncio import get_running_loop, Future
-from threading import Thread, Event
+from asyncio import Future, get_running_loop
+from threading import Event, Thread
+from time import perf_counter, sleep
 
 
 class Sleeper(Thread):

src/textual/_wait.py

@@ -1,5 +1,5 @@
 from asyncio import sleep
-from time import process_time, monotonic
+from time import monotonic, process_time
 
 SLEEP_GRANULARITY: float = 1 / 50
 SLEEP_IDLE: float = SLEEP_GRANULARITY / 2.0

src/textual/_win_sleep.py

@@ -7,7 +7,6 @@ This should only be imported on Windows.
 
 from time import sleep as time_sleep
 
-
 __all__ = ["sleep"]
 
 

src/textual/_xterm_parser.py

@@ -1,17 +1,15 @@
 from __future__ import annotations
 
-import unicodedata
 import re
+import unicodedata
 from typing import Any, Callable, Generator, Iterable
 
-from . import events
-from . import messages
+from . import events, messages
 from ._ansi_sequences import ANSI_SEQUENCES_KEYS
 from ._parser import Awaitable, Parser, TokenCallback
 from ._types import MessageTarget
 from .keys import KEY_NAME_REPLACEMENTS
 
-
 # When trying to determine whether the current sequence is a supported/valid
 # escape sequence, at which length should we give up and consider our search
 # to be unsuccessful?

src/textual/app.py

@@ -50,7 +50,6 @@ from ._context import active_app
 from ._event_broker import NoHandler, extract_handler_actions
 from ._filter import LineFilter, Monochrome
 from ._path import _make_path_object_relative
-
 from ._wait import wait_for_idle
 from .actions import SkipAction
 from .await_remove import AwaitRemove

src/textual/case.py

@@ -1,5 +1,4 @@
 import re
-
 from typing import Match, Pattern
 
 

src/textual/cli/cli.py

@@ -10,8 +10,8 @@ except ImportError:
 
 from importlib_metadata import version
 
+from textual._import_app import AppFail, import_app
 from textual.pilot import Pilot
-from textual._import_app import import_app, AppFail
 
 
 @click.group()
@@ -26,6 +26,7 @@ def run():
 def console(verbose: bool, exclude: list[str]) -> None:
     """Launch the textual console."""
     from rich.console import Console
+
     from textual.devtools.server import _run_devtools
 
     console = Console()

src/textual/cli/previews/borders.py

@@ -1,8 +1,7 @@
 from textual.app import App, ComposeResult
 from textual.constants import BORDERS
-from textual.widgets import Button, Label
 from textual.containers import Vertical
-
+from textual.widgets import Button, Label
 
 TEXT = """I must not fear.
 Fear is the mind-killer.

src/textual/cli/previews/colors.py

@@ -2,7 +2,7 @@ from textual.app import App, ComposeResult
 from textual.containers import Horizontal, Vertical
 from textual.design import ColorSystem
 from textual.widget import Widget
-from textual.widgets import Button, Footer, Static, Label
+from textual.widgets import Button, Footer, Label, Static
 
 
 class ColorButtons(Vertical):

src/textual/cli/previews/easing.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from rich.console import RenderableType
+
 from textual._easing import EASING
 from textual.app import App, ComposeResult
 from textual.cli.previews.borders import TEXT
@@ -8,7 +9,7 @@ from textual.containers import Container, Horizontal, Vertical
 from textual.reactive import reactive, var
 from textual.scrollbar import ScrollBarRender
 from textual.widget import Widget
-from textual.widgets import Button, Footer, Label, Input
+from textual.widgets import Button, Footer, Input, Label
 
 VIRTUAL_SIZE = 100
 WINDOW_SIZE = 10

src/textual/cli/previews/keys.py

@@ -1,16 +1,14 @@
 from __future__ import annotations
 
 from rich.panel import Panel
-
 from rich.text import Text
 
-from textual.app import App, ComposeResult
-from textual.reactive import var, Reactive
 from textual import events
+from textual.app import App, ComposeResult
 from textual.containers import Horizontal
+from textual.reactive import Reactive, var
 from textual.widgets import Button, Header, TextLog
 
-
 INSTRUCTIONS = """\
 [u]Press some keys![/]
 

src/textual/cli/tools/diagnose.py

@@ -1,11 +1,13 @@
 """Textual CLI command code to print diagnostic information."""
 
 from __future__ import annotations
+
 import os
-import sys
 import platform
-from typing import Any
+import sys
 from functools import singledispatch
+from typing import Any
+
 from importlib_metadata import version
 from rich.console import Console, ConsoleDimensions
 

src/textual/css/_help_text.py

@@ -5,20 +5,20 @@ from typing import Iterable, Sequence
 
 from typing_extensions import Literal
 
+from textual.css._error_tools import friendly_list
+from textual.css.scalar import SYMBOL_UNIT
+
 from ..color import ColorParseError
-from ._help_renderables import Example, Bullet, HelpText
+from ._help_renderables import Bullet, Example, HelpText
 from .constants import (
-    VALID_BORDER,
-    VALID_LAYOUT,
     VALID_ALIGN_HORIZONTAL,
     VALID_ALIGN_VERTICAL,
+    VALID_BORDER,
+    VALID_LAYOUT,
     VALID_STYLE_FLAGS,
     VALID_TEXT_ALIGN,
 )
 
-from textual.css._error_tools import friendly_list
-from textual.css.scalar import SYMBOL_UNIT
-
 StylingContext = Literal["inline", "css"]
 """The type of styling the user was using when the error was encountered.
 Used to give help text specific to the context i.e. we give CSS help if the

src/textual/css/_style_properties.py

@@ -10,14 +10,7 @@ when setting and getting.
 from __future__ import annotations
 
 from operator import attrgetter
-from typing import (
-    TYPE_CHECKING,
-    Generic,
-    Iterable,
-    NamedTuple,
-    TypeVar,
-    cast,
-)
+from typing import TYPE_CHECKING, Generic, Iterable, NamedTuple, TypeVar, cast
 
 import rich.errors
 import rich.repr
@@ -611,11 +604,8 @@ class LayoutProperty:
                 or a ``Layout`` object.
         """
 
-        from ..layouts.factory import (
-            Layout,  # Prevents circular import
-            MissingLayout,
-            get_layout,
-        )
+        from ..layouts.factory import Layout  # Prevents circular import
+        from ..layouts.factory import MissingLayout, get_layout
 
         _rich_traceback_omit = True
         if layout is None:

src/textual/css/constants.py

@@ -1,4 +1,5 @@
 from __future__ import annotations
+
 import typing
 
 from ..geometry import Spacing

src/textual/css/errors.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from rich.console import ConsoleOptions, Console, RenderResult
+from rich.console import Console, ConsoleOptions, RenderResult
 from rich.traceback import Traceback
 
 from ._help_renderables import HelpText

src/textual/css/match.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
-from typing import Iterable, TYPE_CHECKING
-from .model import CombinatorType, Selector, SelectorSet
+from typing import TYPE_CHECKING, Iterable
 
+from .model import CombinatorType, Selector, SelectorSet
 
 if TYPE_CHECKING:
     from ..dom import DOMNode

src/textual/css/model.py

@@ -1,11 +1,10 @@
 from __future__ import annotations
 
-
-import rich.repr
-
 from dataclasses import dataclass, field
 from enum import Enum
-from typing import Iterable, TYPE_CHECKING
+from typing import TYPE_CHECKING, Iterable
+
+import rich.repr
 
 from .styles import Styles
 from .tokenize import Token

src/textual/css/parse.py

@@ -2,23 +2,23 @@ from __future__ import annotations
 
 from functools import lru_cache
 from pathlib import PurePath
-from typing import Iterator, Iterable, NoReturn
+from typing import Iterable, Iterator, NoReturn
 
+from ..suggestions import get_suggestion
+from ._styles_builder import DeclarationError, StylesBuilder
 from .errors import UnresolvedVariableError
-from .types import Specificity3
-from ._styles_builder import StylesBuilder, DeclarationError
 from .model import (
+    CombinatorType,
     Declaration,
     RuleSet,
     Selector,
-    CombinatorType,
     SelectorSet,
     SelectorType,
 )
 from .styles import Styles
-from ..suggestions import get_suggestion
-from .tokenize import tokenize, tokenize_declarations, Token, tokenize_values
+from .tokenize import Token, tokenize, tokenize_declarations, tokenize_values
 from .tokenizer import EOFError, ReferencedBy
+from .types import Specificity3
 
 SELECTOR_MAP: dict[str, tuple[SelectorType, Specificity3]] = {
     "selector": (SelectorType.TYPE, (0, 0, 1)),

src/textual/css/scalar.py

@@ -1,9 +1,9 @@
 from __future__ import annotations
 
+import re
 from enum import Enum, unique
 from fractions import Fraction
 from functools import lru_cache
-import re
 from typing import Iterable, NamedTuple
 
 import rich.repr

src/textual/css/scalar_animation.py

@@ -2,15 +2,12 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING
 
-from .scalar import ScalarOffset, Scalar
-from .._animator import Animation
-from .._animator import EasingFunction
+from .._animator import Animation, EasingFunction
 from .._types import CallbackType
-
+from .scalar import Scalar, ScalarOffset
 
 if TYPE_CHECKING:
     from ..dom import DOMNode
-
     from .styles import StylesBase
 
 

src/textual/css/styles.py

@@ -4,8 +4,7 @@ from abc import ABC, abstractmethod
 from dataclasses import dataclass, field
 from functools import lru_cache
 from operator import attrgetter
-from typing import Iterable, cast
-from typing import TYPE_CHECKING, Any, NamedTuple
+from typing import TYPE_CHECKING, Any, Iterable, NamedTuple, cast
 
 import rich.repr
 from rich.style import Style

src/textual/css/tokenize.py

@@ -4,7 +4,7 @@ import re
 from pathlib import PurePath
 from typing import Iterable
 
-from textual.css.tokenizer import Expect, Tokenizer, Token
+from textual.css.tokenizer import Expect, Token, Tokenizer
 
 PERCENT = r"-?\d+\.?\d*%"
 DECIMAL = r"-?\d+\.?\d*"

src/textual/css/tokenizer.py

@@ -4,11 +4,11 @@ import re
 from pathlib import PurePath
 from typing import NamedTuple
 
+import rich.repr
 from rich.console import Group, RenderableType
 from rich.highlighter import ReprHighlighter
 from rich.padding import Padding
 from rich.panel import Panel
-import rich.repr
 from rich.syntax import Syntax
 from rich.text import Text
 

src/textual/css/types.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from typing import Tuple
+
 from typing_extensions import Literal
 
 from ..color import Color

src/textual/demo.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
-from importlib_metadata import version
 from pathlib import Path
 
+from importlib_metadata import version
 from rich import box
 from rich.console import RenderableType
 from rich.json import JSON

src/textual/design.py

@@ -7,8 +7,7 @@ from rich.padding import Padding
 from rich.table import Table
 from rich.text import Text
 
-from .color import Color, WHITE
-
+from .color import WHITE, Color
 
 NUMBER_OF_SHADES = 3
 

src/textual/devtools/client.py

@@ -9,21 +9,14 @@ from io import StringIO
 from time import time
 from typing import Any, NamedTuple, Type
 
+import aiohttp
+import msgpack
+from aiohttp import ClientConnectorError, ClientResponseError, ClientWebSocketResponse
 from rich.console import Console
 from rich.segment import Segment
 
 from .._log import LogGroup, LogVerbosity
 
-
-import aiohttp
-import msgpack
-from aiohttp import (
-    ClientConnectorError,
-    ClientResponseError,
-    ClientWebSocketResponse,
-)
-
-
 DEVTOOLS_PORT = 8081
 WEBSOCKET_CONNECT_TIMEOUT = 3
 LOG_QUEUE_MAXSIZE = 512

src/textual/devtools/redirect_output.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
 import inspect
-
 from typing import TYPE_CHECKING, cast
-from .client import DevtoolsLog
+
 from .._log import LogGroup, LogVerbosity
+from .client import DevtoolsLog
 
 if TYPE_CHECKING:
     from .client import DevtoolsClient

src/textual/devtools/server.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import asyncio
+
 from aiohttp.web import run_app
 from aiohttp.web_app import Application
 from aiohttp.web_request import Request

src/textual/devtools/service.py

@@ -7,19 +7,19 @@ import pickle
 from json import JSONDecodeError
 from typing import Any, cast
 
+import msgpack
 from aiohttp import WSMessage, WSMsgType
 from aiohttp.abc import Request
 from aiohttp.web_ws import WebSocketResponse
 from rich.console import Console
 from rich.markup import escape
-import msgpack
 
 from textual._log import LogGroup
 from textual._time import time
 from textual.devtools.renderables import (
+    DevConsoleHeader,
     DevConsoleLog,
     DevConsoleNotice,
-    DevConsoleHeader,
 )
 
 QUEUEABLE_TYPES = {"client_log", "client_spillover"}

src/textual/drivers/headless_driver.py

@@ -1,9 +1,10 @@
 from __future__ import annotations
 
 import asyncio
+
+from .. import events
 from ..driver import Driver
 from ..geometry import Size
-from .. import events
 
 
 class HeadlessDriver(Driver):

src/textual/drivers/linux_driver.py

@@ -2,27 +2,26 @@ from __future__ import annotations
 
 import asyncio
 import os
-from codecs import getincrementaldecoder
 import selectors
 import signal
 import sys
 import termios
 import tty
-from typing import Any, TYPE_CHECKING
+from codecs import getincrementaldecoder
 from threading import Event, Thread
+from typing import TYPE_CHECKING, Any
 
 if TYPE_CHECKING:
     from rich.console import Console
 
 import rich.repr
 
-from .. import log
-from ..driver import Driver
-from ..geometry import Size
+from .. import events, log
+from .._profile import timer
 from .._types import MessageTarget
 from .._xterm_parser import XTermParser
-from .._profile import timer
-from .. import events
+from ..driver import Driver
+from ..geometry import Size
 
 
 @rich.repr.auto

src/textual/geometry.py

@@ -9,6 +9,7 @@ from __future__ import annotations
 from functools import lru_cache
 from operator import attrgetter, itemgetter
 from typing import (
+    TYPE_CHECKING,
     Any,
     Collection,
     NamedTuple,
@@ -16,7 +17,6 @@ from typing import (
     TypeVar,
     Union,
     cast,
-    TYPE_CHECKING,
 )
 
 if TYPE_CHECKING:

src/textual/layouts/factory.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
 from .._layout import Layout
-from .horizontal import HorizontalLayout
 from .grid import GridLayout
+from .horizontal import HorizontalLayout
 from .vertical import VerticalLayout
 
 LAYOUT_MAP: dict[str, type[Layout]] = {

src/textual/layouts/horizontal.py

@@ -2,9 +2,9 @@ from __future__ import annotations
 
 from fractions import Fraction
 
-from .._resolve import resolve_box_models
-from ..geometry import Size, Region
 from .._layout import ArrangeResult, Layout, WidgetPlacement
+from .._resolve import resolve_box_models
+from ..geometry import Region, Size
 from ..widget import Widget
 
 

src/textual/layouts/vertical.py

@@ -3,9 +3,9 @@ from __future__ import annotations
 from fractions import Fraction
 from typing import TYPE_CHECKING
 
+from .._layout import ArrangeResult, Layout, WidgetPlacement
 from .._resolve import resolve_box_models
 from ..geometry import Region, Size
-from .._layout import ArrangeResult, Layout, WidgetPlacement
 
 if TYPE_CHECKING:
     from ..widget import Widget

src/textual/message.py

@@ -1,16 +1,16 @@
 from __future__ import annotations
 
-from typing import ClassVar, TYPE_CHECKING
+from typing import TYPE_CHECKING, ClassVar
 
 import rich.repr
 
 from . import _clock
-from .case import camel_to_snake
 from ._types import MessageTarget as MessageTarget
+from .case import camel_to_snake
 
 if TYPE_CHECKING:
-    from .widget import Widget
     from .message_pump import MessagePump
+    from .widget import Widget
 
 
 @rich.repr.auto

src/textual/messages.py

@@ -1,13 +1,13 @@
 from __future__ import annotations
+
 from typing import TYPE_CHECKING
 
 import rich.repr
 
-from .geometry import Region
 from ._types import CallbackType
+from .geometry import Region
 from .message import Message
 
-
 if TYPE_CHECKING:
     from .message_pump import MessagePump
     from .widget import Widget

src/textual/pilot.py

@@ -1,12 +1,12 @@
 from __future__ import annotations
 
-import rich.repr
-
 import asyncio
 from typing import Generic
 
-from .app import App, ReturnType
+import rich.repr
+
 from ._wait import wait_for_idle
+from .app import App, ReturnType
 
 
 @rich.repr.auto(angular=True)

src/textual/reactive.py

@@ -17,7 +17,7 @@ import rich.repr
 
 from . import events
 from ._callback import count_parameters
-from ._types import MessageTarget, CallbackType
+from ._types import CallbackType, MessageTarget
 
 if TYPE_CHECKING:
     from .dom import DOMNode

src/textual/renderables/blank.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from rich.console import ConsoleOptions, Console, RenderResult
+from rich.console import Console, ConsoleOptions, RenderResult
 from rich.segment import Segment
 from rich.style import Style
 

src/textual/renderables/gradient.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
-from rich.console import ConsoleOptions, Console, RenderResult
-
+from rich.console import Console, ConsoleOptions, RenderResult
 from rich.segment import Segment
 from rich.style import Style
 

src/textual/renderables/sparkline.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
 import statistics
-from typing import Generic, Sequence, Iterable, Callable, TypeVar
+from typing import Callable, Generic, Iterable, Sequence, TypeVar
 
 from rich.color import Color
-from rich.console import ConsoleOptions, Console, RenderResult
+from rich.console import Console, ConsoleOptions, RenderResult
 from rich.segment import Segment
 from rich.style import Style
 

src/textual/renderables/text_opacity.py

@@ -3,7 +3,7 @@ from typing import Iterable, Tuple, cast
 
 from rich.cells import cell_len
 from rich.color import Color
-from rich.console import ConsoleOptions, Console, RenderResult, RenderableType
+from rich.console import Console, ConsoleOptions, RenderableType, RenderResult
 from rich.segment import Segment
 from rich.style import Style
 

src/textual/renderables/tint.py

@@ -2,7 +2,7 @@ from __future__ import annotations
 
 from typing import Iterable
 
-from rich.console import ConsoleOptions, Console, RenderResult, RenderableType
+from rich.console import Console, ConsoleOptions, RenderableType, RenderResult
 from rich.segment import Segment
 from rich.style import Style
 

src/textual/renderables/underline_bar.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from rich.console import ConsoleOptions, Console, RenderResult
+from rich.console import Console, ConsoleOptions, RenderResult
 from rich.style import StyleType
 from rich.text import Text
 
@@ -99,6 +99,7 @@ class UnderlineBar:
 if __name__ == "__main__":
     import random
     from time import sleep
+
     from rich.color import ANSI_COLOR_NAMES
 
     console = Console()

src/textual/screen.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from typing import Iterable, Iterator, TYPE_CHECKING
+from typing import TYPE_CHECKING, Iterable, Iterator
 
 import rich.repr
 from rich.console import RenderableType
@@ -9,14 +9,14 @@ from rich.style import Style
 from . import errors, events, messages
 from ._callback import invoke
 from ._compositor import Compositor, MapGeometry
+from ._types import CallbackType
 from .css.match import match
 from .css.parse import parse_selectors
 from .dom import DOMNode
-from .timer import Timer
-from ._types import CallbackType
 from .geometry import Offset, Region, Size
 from .reactive import Reactive
 from .renderables.blank import Blank
+from .timer import Timer
 from .widget import Widget
 
 if TYPE_CHECKING:

src/textual/walk.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from collections import deque
-from typing import Iterable, Iterator, TypeVar, overload, TYPE_CHECKING
+from typing import TYPE_CHECKING, Iterable, Iterator, TypeVar, overload
 
 if TYPE_CHECKING:
     from textual.dom import DOMNode

src/textual/widget.py

@@ -35,9 +35,9 @@ from rich.text import Text
 from rich.traceback import Traceback
 
 from . import errors, events, messages
-from ._asyncio import create_task
 from ._animator import DEFAULT_EASING, Animatable, BoundAnimator, EasingFunction
 from ._arrange import DockArrangeResult, arrange
+from ._asyncio import create_task
 from ._context import active_app
 from ._easing import DEFAULT_SCROLL_EASING
 from ._layout import Layout

src/textual/widgets/__init__.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
-from importlib import import_module
+
 import typing
+from importlib import import_module
 
 from ..case import camel_to_snake
 
@@ -8,6 +9,7 @@ from ..case import camel_to_snake
 # but also to the `__init__.pyi` file in this same folder - otherwise text editors and type checkers won't
 # be able to "see" them.
 if typing.TYPE_CHECKING:
+    from ..widget import Widget
     from ._button import Button
     from ._checkbox import Checkbox
     from ._data_table import DataTable
@@ -24,7 +26,6 @@ if typing.TYPE_CHECKING:
     from ._text_log import TextLog
     from ._tree import Tree
     from ._welcome import Welcome
-    from ..widget import Widget
 
 
 __all__ = [

src/textual/widgets/__init__.pyi

@@ -1,17 +1,17 @@
 # This stub file must re-export every classes exposed in the __init__.py's `__all__` list:
 from ._button import Button as Button
-from ._data_table import DataTable as DataTable
 from ._checkbox import Checkbox as Checkbox
+from ._data_table import DataTable as DataTable
 from ._directory_tree import DirectoryTree as DirectoryTree
 from ._footer import Footer as Footer
 from ._header import Header as Header
+from ._input import Input as Input
 from ._label import Label as Label
-from ._list_view import ListView as ListView
 from ._list_item import ListItem as ListItem
+from ._list_view import ListView as ListView
 from ._placeholder import Placeholder as Placeholder
 from ._pretty import Pretty as Pretty
 from ._static import Static as Static
-from ._input import Input as Input
 from ._text_log import TextLog as TextLog
 from ._tree import Tree as Tree
 from ._welcome import Welcome as Welcome

src/textual/widgets/_button.py

@@ -2,11 +2,11 @@ from __future__ import annotations
 
 from functools import partial
 from typing import cast
-from typing_extensions import Literal
 
 import rich.repr
 from rich.console import RenderableType
 from rich.text import Text, TextType
+from typing_extensions import Literal
 
 from .. import events
 from ..css._error_tools import friendly_list
@@ -14,7 +14,6 @@ from ..message import Message
 from ..reactive import reactive
 from ..widgets import Static
 
-
 ButtonVariant = Literal["default", "primary", "success", "warning", "error"]
 _VALID_BUTTON_VARIANTS = {"default", "primary", "success", "warning", "error"}
 

src/textual/widgets/_checkbox.py

@@ -8,8 +8,8 @@ from ..binding import Binding, BindingType
 from ..geometry import Size
 from ..message import Message
 from ..reactive import reactive
-from ..widget import Widget
 from ..scrollbar import ScrollBarRender
+from ..widget import Widget
 
 
 class Checkbox(Widget, can_focus=True):

src/textual/widgets/_data_table.py

@@ -3,7 +3,6 @@ from __future__ import annotations
 from dataclasses import dataclass, field
 from itertools import chain, zip_longest
 from typing import Generic, Iterable, cast
-from typing_extensions import ClassVar, TypeVar, Literal
 
 import rich.repr
 from rich.console import RenderableType
@@ -12,6 +11,7 @@ from rich.protocol import is_renderable
 from rich.segment import Segment
 from rich.style import Style
 from rich.text import Text, TextType
+from typing_extensions import ClassVar, Literal, TypeVar
 
 from .. import events, messages
 from .._cache import LRUCache

src/textual/widgets/_directory_tree.py

@@ -7,9 +7,9 @@ from typing import ClassVar
 from rich.style import Style
 from rich.text import Text, TextType
 
-from ..message import Message
-from ._tree import Tree, TreeNode, TOGGLE_STYLE
 from .._types import MessageTarget
+from ..message import Message
+from ._tree import TOGGLE_STYLE, Tree, TreeNode
 
 
 @dataclass

src/textual/widgets/_header.py

@@ -4,8 +4,8 @@ from datetime import datetime
 
 from rich.text import Text
 
-from ..widget import Widget
 from ..reactive import Reactive
+from ..widget import Widget
 
 
 class HeaderIcon(Widget):

src/textual/widgets/_input.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
-from typing import ClassVar
 
 import re
+from typing import ClassVar
 
 from rich.cells import cell_len, get_character_cell_size
 from rich.console import Console, ConsoleOptions, RenderableType, RenderResult

src/textual/widgets/_list_view.py

@@ -1,4 +1,5 @@
 from __future__ import annotations
+
 from typing import ClassVar
 
 from textual.await_remove import AwaitRemove

src/textual/widgets/_placeholder.py

@@ -7,8 +7,7 @@ from typing_extensions import Literal
 from .. import events
 from ..css._error_tools import friendly_list
 from ..reactive import Reactive, reactive
-from ..widget import Widget, RenderResult
-
+from ..widget import RenderResult, Widget
 
 PlaceholderVariant = Literal["default", "size", "text"]
 _VALID_PLACEHOLDER_VARIANTS_ORDERED: list[PlaceholderVariant] = [

src/textual/widgets/_pretty.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 from typing import Any
+
 from rich.pretty import Pretty as PrettyRenderable
 
 from ..widget import Widget

src/textual/widgets/_welcome.py

@@ -1,10 +1,10 @@
-from ..app import ComposeResult
-from ._static import Static
-from ._button import Button
-from ..containers import Container
-
 from rich.markdown import Markdown
 
+from ..app import ComposeResult
+from ..containers import Container
+from ._button import Button
+from ._static import Static
+
 WELCOME_MD = """\
 # Welcome!
 

src/textual/widgets/tabs.py

@@ -7,11 +7,11 @@ from typing import Iterable
 from rich.cells import cell_len
 from rich.console import Console, ConsoleOptions, RenderableType, RenderResult
 from rich.segment import Segment
-from rich.style import StyleType, Style
+from rich.style import Style, StyleType
 from rich.text import Text
 
 from textual import events
-from textual._layout_resolve import layout_resolve, Edge
+from textual._layout_resolve import Edge, layout_resolve
 from textual.keys import Keys
 from textual.reactive import Reactive
 from textual.renderables.text_opacity import TextOpacity

tests/css/test_help_text.py

@@ -2,17 +2,17 @@ import pytest
 
 from tests.utilities.render import render
 from textual.css._help_text import (
-    spacing_wrong_number_of_values_help_text,
-    spacing_invalid_value_help_text,
-    scalar_help_text,
-    string_enum_help_text,
-    color_property_help_text,
-    border_property_help_text,
-    layout_property_help_text,
-    fractional_property_help_text,
-    offset_property_help_text,
     align_help_text,
+    border_property_help_text,
+    color_property_help_text,
+    fractional_property_help_text,
+    layout_property_help_text,
+    offset_property_help_text,
     offset_single_axis_help_text,
+    scalar_help_text,
+    spacing_invalid_value_help_text,
+    spacing_wrong_number_of_values_help_text,
+    string_enum_help_text,
     style_flags_property_help_text,
 )
 

tests/css/test_parse.py

@@ -8,7 +8,7 @@ from textual.css.parse import substitute_references
 from textual.css.scalar import Scalar, Unit
 from textual.css.stylesheet import Stylesheet, StylesheetParseError
 from textual.css.tokenize import tokenize
-from textual.css.tokenizer import Token, ReferencedBy
+from textual.css.tokenizer import ReferencedBy, Token
 from textual.css.transition import Transition
 from textual.geometry import Spacing
 from textual.layouts.vertical import VerticalLayout

tests/css/test_styles.py

@@ -1,13 +1,12 @@
 from decimal import Decimal
 
 import pytest
-
 from rich.style import Style
 
 from textual.color import Color
 from textual.css.errors import StyleValueError
 from textual.css.scalar import Scalar, Unit
-from textual.css.styles import Styles, RenderStyles
+from textual.css.styles import RenderStyles, Styles
 from textual.dom import DOMNode
 from textual.widget import Widget
 

tests/devtools/__init__.py

@@ -11,6 +11,4 @@ _WINDOWS = sys.platform == "win32"
 # and the error messages suggest the event loop is being shutdown before async fixture
 # teardown code has finished running. These are very rare, but are much more of an issue on
 # CI since they can delay builds that have passed locally.
-pytestmark = pytest.mark.skipif(
-    _MACOS_CI or _WINDOWS, reason="Issue #411"
-)
+pytestmark = pytest.mark.skipif(_MACOS_CI or _WINDOWS, reason="Issue #411")

tests/devtools/test_devtools_client.py

@@ -30,7 +30,6 @@ async def test_devtools_client_is_connected(devtools):
 
 @time_machine.travel(datetime.utcfromtimestamp(TIMESTAMP))
 async def test_devtools_log_places_encodes_and_queues_message(devtools):
-
     await devtools._stop_log_queue_processing()
     devtools.log(DevtoolsLog("Hello, world!", CALLER))
     queued_log = await devtools.log_queue.get()

tests/input/test_input_key_modification_actions.py

@@ -5,7 +5,6 @@ from __future__ import annotations
 from textual.app import App, ComposeResult
 from textual.widgets import Input
 
-
 TEST_INPUTS: dict[str | None, str] = {
     "empty": "",
     "multi-no-punctuation": "Curse your sudden but inevitable betrayal",

tests/input/test_input_value_visibility.py

@@ -1,4 +1,5 @@
 from rich.console import Console
+
 from textual.app import App
 from textual.widgets import Input
 

tests/layouts/test_content_dimensions.py

@@ -1,12 +1,11 @@
 import pytest
 
+from textual.geometry import Size
 from textual.layouts.grid import GridLayout
 from textual.layouts.horizontal import HorizontalLayout
 from textual.layouts.vertical import VerticalLayout
-from textual.geometry import Size
 from textual.widget import Widget
 
-
 LAYOUTS = [GridLayout, HorizontalLayout, VerticalLayout]
 
 

tests/layouts/test_factory.py

@@ -1,6 +1,6 @@
 import pytest
 
-from textual.layouts.factory import get_layout, MissingLayout
+from textual.layouts.factory import MissingLayout, get_layout
 from textual.layouts.vertical import VerticalLayout
 
 

tests/listview/test_inherit_listview.py

@@ -1,5 +1,5 @@
 from textual.app import App, ComposeResult
-from textual.widgets import ListView, ListItem, Label
+from textual.widgets import Label, ListItem, ListView
 
 
 class MyListView(ListView):

tests/renderables/test_sparkline.py

@@ -20,22 +20,35 @@ def test_sparkline_two_values_min_max():
 
 
 def test_sparkline_expand_data_to_width():
-    assert render(Sparkline([2, 4],
-                            width=4)) == f"{GREEN}▁{STOP}{GREEN}▁{STOP}{RED}█{STOP}{RED}█{STOP}"
+    assert (
+        render(Sparkline([2, 4], width=4))
+        == f"{GREEN}▁{STOP}{GREEN}▁{STOP}{RED}█{STOP}{RED}█{STOP}"
+    )
 
 
 def test_sparkline_expand_data_to_width_non_divisible():
-    assert render(Sparkline([2, 4], width=3)) == f"{GREEN}▁{STOP}{GREEN}▁{STOP}{RED}█{STOP}"
+    assert (
+        render(Sparkline([2, 4], width=3))
+        == f"{GREEN}▁{STOP}{GREEN}▁{STOP}{RED}█{STOP}"
+    )
 
 
 def test_sparkline_shrink_data_to_width():
-    assert render(Sparkline([2, 2, 4, 4, 6, 6], width=3)) == f"{GREEN}▁{STOP}{BLENDED}▄{STOP}{RED}█{STOP}"
+    assert (
+        render(Sparkline([2, 2, 4, 4, 6, 6], width=3))
+        == f"{GREEN}▁{STOP}{BLENDED}▄{STOP}{RED}█{STOP}"
+    )
 
 
 def test_sparkline_shrink_data_to_width_non_divisible():
-    assert render(
-        Sparkline([1, 2, 3, 4, 5], width=3, summary_function=min)) == f"{GREEN}▁{STOP}{BLENDED}▄{STOP}{RED}█{STOP}"
+    assert (
+        render(Sparkline([1, 2, 3, 4, 5], width=3, summary_function=min))
+        == f"{GREEN}▁{STOP}{BLENDED}▄{STOP}{RED}█{STOP}"
+    )
 
 
 def test_sparkline_color_blend():
-    assert render(Sparkline([1, 2, 3], width=3)) == f"{GREEN}▁{STOP}{BLENDED}▄{STOP}{RED}█{STOP}"
+    assert (
+        render(Sparkline([1, 2, 3], width=3))
+        == f"{GREEN}▁{STOP}{BLENDED}▄{STOP}{RED}█{STOP}"
+    )

tests/renderables/test_text_opacity.py

@@ -14,7 +14,7 @@ def text():
 
 def test_simple_text_opacity(text):
     blended_red_on_green = "\x1b[38;2;127;127;0;48;2;0;255;0m"
-    assert render(TextOpacity(text, opacity=.5)) == (
+    assert render(TextOpacity(text, opacity=0.5)) == (
         f"{blended_red_on_green}Hello, world!{STOP}"
     )
 
@@ -31,19 +31,21 @@ def test_text_opacity_value_of_one_noop(text):
 
 def test_ansi_colors_noop():
     ansi_colored_text = Text("Hello, world!", style="red on green", end="")
-    assert render(TextOpacity(ansi_colored_text, opacity=.5)) == render(ansi_colored_text)
+    assert render(TextOpacity(ansi_colored_text, opacity=0.5)) == render(
+        ansi_colored_text
+    )
 
 
 def test_text_opacity_no_style_noop():
     text_no_style = Text("Hello, world!", end="")
-    assert render(TextOpacity(text_no_style, opacity=.2)) == render(text_no_style)
+    assert render(TextOpacity(text_no_style, opacity=0.2)) == render(text_no_style)
 
 
 def test_text_opacity_only_fg_noop():
     text_only_fg = Text("Hello, world!", style="#ff0000", end="")
-    assert render(TextOpacity(text_only_fg, opacity=.5)) == render(text_only_fg)
+    assert render(TextOpacity(text_only_fg, opacity=0.5)) == render(text_only_fg)
 
 
 def test_text_opacity_only_bg_noop():
     text_only_bg = Text("Hello, world!", style="on #ff0000", end="")
-    assert render(TextOpacity(text_only_bg, opacity=.5)) == render(text_only_bg)
+    assert render(TextOpacity(text_only_bg, opacity=0.5)) == render(text_only_bg)

tests/renderables/test_underline_bar.py

@@ -1,7 +1,6 @@
 from unittest.mock import create_autospec
 
-from rich.console import Console
-from rich.console import ConsoleOptions
+from rich.console import Console, ConsoleOptions
 from rich.text import Text
 
 from tests.utilities.render import render
@@ -21,16 +20,12 @@ def test_no_highlight():
 
 def test_highlight_from_zero():
     bar = UnderlineBar(highlight_range=(0, 2.5), width=6)
-    assert render(bar) == (
-        f"{MAGENTA}━━{STOP}{MAGENTA}╸{STOP}{GREY}━━━{STOP}"
-    )
+    assert render(bar) == (f"{MAGENTA}━━{STOP}{MAGENTA}╸{STOP}{GREY}━━━{STOP}")
 
 
 def test_highlight_from_zero_point_five():
     bar = UnderlineBar(highlight_range=(0.5, 2), width=6)
-    assert render(bar) == (
-        f"{MAGENTA}╺━{STOP}{GREY}╺{STOP}{GREY}━━━{STOP}"
-    )
+    assert render(bar) == (f"{MAGENTA}╺━{STOP}{GREY}╺{STOP}{GREY}━━━{STOP}")
 
 
 def test_highlight_middle():
@@ -47,10 +42,7 @@ def test_highlight_middle():
 def test_highlight_half_start():
     bar = UnderlineBar(highlight_range=(2.5, 4), width=6)
     assert render(bar) == (
-        f"{GREY}━━{STOP}"
-        f"{MAGENTA}╺━{STOP}"
-        f"{GREY}╺{STOP}"
-        f"{GREY}━{STOP}"
+        f"{GREY}━━{STOP}" f"{MAGENTA}╺━{STOP}" f"{GREY}╺{STOP}" f"{GREY}━{STOP}"
     )
 
 
@@ -68,42 +60,30 @@ def test_highlight_half_end():
 def test_highlight_half_start_and_half_end():
     bar = UnderlineBar(highlight_range=(2.5, 4.5), width=6)
     assert render(bar) == (
-        f"{GREY}━━{STOP}"
-        f"{MAGENTA}╺━{STOP}"
-        f"{MAGENTA}╸{STOP}"
-        f"{GREY}━{STOP}"
+        f"{GREY}━━{STOP}" f"{MAGENTA}╺━{STOP}" f"{MAGENTA}╸{STOP}" f"{GREY}━{STOP}"
     )
 
 
 def test_highlight_to_near_end():
     bar = UnderlineBar(highlight_range=(3, 5.5), width=6)
     assert render(bar) == (
-        f"{GREY}━━{STOP}"
-        f"{GREY}╸{STOP}"
-        f"{MAGENTA}━━{STOP}"
-        f"{MAGENTA}╸{STOP}"
+        f"{GREY}━━{STOP}" f"{GREY}╸{STOP}" f"{MAGENTA}━━{STOP}" f"{MAGENTA}╸{STOP}"
     )
 
 
 def test_highlight_to_end():
     bar = UnderlineBar(highlight_range=(3, 6), width=6)
-    assert render(bar) == (
-        f"{GREY}━━{STOP}{GREY}╸{STOP}{MAGENTA}━━━{STOP}"
-    )
+    assert render(bar) == (f"{GREY}━━{STOP}{GREY}╸{STOP}{MAGENTA}━━━{STOP}")
 
 
 def test_highlight_out_of_bounds_start():
     bar = UnderlineBar(highlight_range=(-2, 3), width=6)
-    assert render(bar) == (
-        f"{MAGENTA}━━━{STOP}{GREY}╺{STOP}{GREY}━━{STOP}"
-    )
+    assert render(bar) == (f"{MAGENTA}━━━{STOP}{GREY}╺{STOP}{GREY}━━{STOP}")
 
 
 def test_highlight_out_of_bounds_end():
     bar = UnderlineBar(highlight_range=(3, 9), width=6)
-    assert render(bar) == (
-        f"{GREY}━━{STOP}{GREY}╸{STOP}{MAGENTA}━━━{STOP}"
-    )
+    assert render(bar) == (f"{GREY}━━{STOP}{GREY}╸{STOP}{MAGENTA}━━━{STOP}")
 
 
 def test_highlight_full_range_out_of_bounds_end():
@@ -117,7 +97,9 @@ def test_highlight_full_range_out_of_bounds_start():
 
 
 def test_custom_styles():
-    bar = UnderlineBar(highlight_range=(2, 4), highlight_style="red", background_style="green", width=6)
+    bar = UnderlineBar(
+        highlight_range=(2, 4), highlight_style="red", background_style="green", width=6
+    )
     assert render(bar) == (
         f"{GREEN}━{STOP}"
         f"{GREEN}╸{STOP}"
@@ -128,7 +110,9 @@ def test_custom_styles():
 
 
 def test_clickable_ranges():
-    bar = UnderlineBar(highlight_range=(0, 1), width=6, clickable_ranges={"foo": (0, 2), "bar": (4, 5)})
+    bar = UnderlineBar(
+        highlight_range=(0, 1), width=6, clickable_ranges={"foo": (0, 2), "bar": (4, 5)}
+    )
 
     console = create_autospec(Console)
     options = create_autospec(ConsoleOptions)
@@ -136,8 +120,8 @@ def test_clickable_ranges():
 
     start, end, style = text.spans[-2]
     assert (start, end) == (0, 2)
-    assert style.meta == {'@click': "range_clicked('foo')"}
+    assert style.meta == {"@click": "range_clicked('foo')"}
 
     start, end, style = text.spans[-1]
     assert (start, end) == (4, 5)
-    assert style.meta == {'@click': "range_clicked('bar')"}
+    assert style.meta == {"@click": "range_clicked('bar')"}

tests/test_animator.py

@@ -6,7 +6,7 @@ from unittest.mock import Mock
 import pytest
 
 from textual._animator import Animator, SimpleAnimation
-from textual._easing import EASING, DEFAULT_EASING
+from textual._easing import DEFAULT_EASING, EASING
 
 
 class Animatable:

tests/test_arrange.py

@@ -1,6 +1,6 @@
 import pytest
 
-from textual._arrange import arrange, TOP_Z
+from textual._arrange import TOP_Z, arrange
 from textual._layout import WidgetPlacement
 from textual.geometry import Region, Size, Spacing
 from textual.widget import Widget

tests/test_auto_pilot.py

@@ -1,10 +1,9 @@
+from textual import events
 from textual.app import App
 from textual.pilot import Pilot
-from textual import events
 
 
 def test_auto_pilot() -> None:
-
     keys_pressed: list[str] = []
 
     class TestApp(App):
@@ -12,7 +11,6 @@ def test_auto_pilot() -> None:
             keys_pressed.append(event.key)
 
     async def auto_pilot(pilot: Pilot) -> None:
-
         await pilot.press("tab", *"foo")
         await pilot.exit("bar")
 

tests/test_binding.py

@@ -3,7 +3,7 @@ from string import ascii_lowercase
 import pytest
 
 from textual.app import App
-from textual.binding import Bindings, Binding, BindingError, NoBinding, InvalidBinding
+from textual.binding import Binding, BindingError, Bindings, InvalidBinding, NoBinding
 
 BINDING1 = Binding("a,b", action="action1", description="description1")
 BINDING2 = Binding("c", action="action2", description="description2")