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

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")

tests/test_border.py

@@ -5,7 +5,6 @@ from textual._border import render_row
 
 
 def test_border_render_row():
-
     style = Style.parse("red")
     row = (Segment("┏", style), Segment("━", style), Segment("┓", style))
 

tests/test_cache.py

@@ -1,5 +1,4 @@
-from __future__ import annotations
-from __future__ import unicode_literals
+from __future__ import annotations, unicode_literals
 
 import pytest
 

tests/test_call_later.py

@@ -1,4 +1,5 @@
 import asyncio
+
 from textual.app import App
 
 

tests/test_color.py

@@ -43,7 +43,6 @@ def test_rgb():
 
 
 def test_hls():
-
     red = Color(200, 20, 32)
     print(red.hsl)
     assert red.hsl == pytest.approx(

tests/test_concurrency.py

@@ -1,6 +1,7 @@
+from threading import Thread
+
 import pytest
 
-from threading import Thread
 from textual.app import App, ComposeResult
 from textual.widgets import TextLog
 

tests/test_dom.py

@@ -1,7 +1,7 @@
 import pytest
 
 from textual.css.errors import StyleValueError
-from textual.dom import DOMNode, BadIdentifier
+from textual.dom import BadIdentifier, DOMNode
 
 
 def test_display_default():

tests/test_geometry.py

@@ -1,6 +1,6 @@
 import pytest
 
-from textual.geometry import clamp, Offset, Size, Region, Spacing
+from textual.geometry import Offset, Region, Size, Spacing, clamp
 
 
 def test_dimensions_region():
@@ -299,6 +299,7 @@ def test_size_line_range():
     assert Size(20, 0).line_range == range(0)
     assert Size(0, 20).line_range == range(20)
 
+
 def test_region_x_extents():
     assert Region(5, 10, 20, 30).column_span == (5, 25)
 

tests/test_immutable_sequence_view.py

@@ -1,6 +1,7 @@
+from typing import Sequence
+
 import pytest
 
-from typing import Sequence
 from textual._immutable_sequence_view import ImmutableSequenceView
 
 

tests/test_loop.py

@@ -1,4 +1,4 @@
-from textual._loop import loop_first, loop_last, loop_first_last
+from textual._loop import loop_first, loop_first_last, loop_last
 
 
 def test_loop_first():

tests/test_node_list.py

@@ -1,7 +1,7 @@
 import pytest
 
-from textual.widget import Widget
 from textual._node_list import NodeList
+from textual.widget import Widget
 
 
 def test_empty_list():

tests/test_overflow_change.py

@@ -1,7 +1,6 @@
 """Regression test for #1616 https://github.com/Textualize/textual/issues/1616"""
 import pytest
 
-
 from textual.app import App
 from textual.containers import Vertical
 

tests/test_paste.py

@@ -1,5 +1,5 @@
-from textual.app import App
 from textual import events
+from textual.app import App
 
 
 async def test_paste_app():

tests/test_path.py

@@ -1,5 +1,7 @@
 from __future__ import annotations
+
 from pathlib import Path
+
 import pytest
 
 from textual.app import App

tests/test_query.py

@@ -2,8 +2,8 @@ import pytest
 
 from textual.app import App, ComposeResult
 from textual.containers import Container
+from textual.css.query import InvalidQueryFormat, NoMatches, TooManyMatches, WrongType
 from textual.widget import Widget
-from textual.css.query import InvalidQueryFormat, WrongType, NoMatches, TooManyMatches
 
 
 def test_query():

tests/test_reactive.py

@@ -259,7 +259,6 @@ async def test_reactive_method_call_order():
 
 
 async def test_premature_reactive_call():
-
     watcher_called = False
 
     class BrokenWidget(Widget):
@@ -335,7 +334,6 @@ async def test_watch_compute():
     watch_called: list[bool] = []
 
     class Calculator(App):
-
         numbers = var("0")
         show_ac = var(True)
         value = var("")

tests/test_screens.py

@@ -16,15 +16,17 @@ async def test_installed_screens():
         SCREENS = {
             "home": Screen,  # Screen type
             "one": Screen(),  # Screen instance
-            "two": lambda: Screen()  # Callable[[], Screen]
+            "two": lambda: Screen(),  # Callable[[], Screen]
         }
 
     app = ScreensApp()
     async with app.run_test() as pilot:
         pilot.app.push_screen("home")  # Instantiates and pushes the "home" screen
-        pilot.app.push_screen("one")   # Pushes the pre-instantiated "one" screen
+        pilot.app.push_screen("one")  # Pushes the pre-instantiated "one" screen
         pilot.app.push_screen("home")  # Pushes the single instance of "home" screen
-        pilot.app.push_screen("two")   # Calls the callable, pushes returned Screen instance
+        pilot.app.push_screen(
+            "two"
+        )  # Calls the callable, pushes returned Screen instance
 
         assert len(app.screen_stack) == 5
         assert app.screen_stack[1] is app.screen_stack[3]
@@ -40,10 +42,8 @@ async def test_installed_screens():
             pilot.app.pop_screen()
 
 
-
 @skip_py310
 async def test_screens():
-
     app = App()
     app._set_active()
 

tests/test_segment_tools.py

@@ -1,7 +1,7 @@
 from rich.segment import Segment
 from rich.style import Style
 
-from textual._segment_tools import line_crop, line_trim, line_pad
+from textual._segment_tools import line_crop, line_pad, line_trim
 
 
 def test_line_crop():

tests/test_strip.py

@@ -2,9 +2,9 @@ import pytest
 from rich.segment import Segment
 from rich.style import Style
 
+from textual._filter import Monochrome
 from textual._segment_tools import NoCellPositionForIndex
 from textual.strip import Strip
-from textual._filter import Monochrome
 
 
 def test_cell_length() -> None:

tests/test_table.py

@@ -46,8 +46,8 @@ async def test_table_clear_with_columns() -> None:
         assert table.data == {}
         assert table.row_count == 0
 
-async def test_table_add_row() -> None:
 
+async def test_table_add_row() -> None:
     app = TableApp()
     async with app.run_test():
         table = app.query_one(DataTable)

tests/test_test_runner.py

@@ -1,5 +1,5 @@
-from textual.app import App
 from textual import events
+from textual.app import App
 
 
 async def test_run_test() -> None:

tests/test_text_backend.py

@@ -113,21 +113,25 @@ def test_query_cursor_right_cursor_at_end_returns_false():
     editor = TextEditorBackend(CONTENT, len(CONTENT))
     assert not editor.query_cursor_right()
 
+
 def test_cursor_text_start_cursor_already_at_start():
     editor = TextEditorBackend(CONTENT)
     assert not editor.cursor_text_start()
     assert editor.cursor_index == 0
 
+
 def test_cursor_text_start_cursor_in_middle():
     editor = TextEditorBackend(CONTENT, 6)
     assert editor.cursor_text_start()
     assert editor.cursor_index == 0
 
+
 def test_cursor_text_end_cursor_already_at_end():
     editor = TextEditorBackend(CONTENT, len(CONTENT))
     assert not editor.cursor_text_end()
     assert editor.cursor_index == len(CONTENT)
 
+
 def test_cursor_text_end_cursor_in_middle():
     editor = TextEditorBackend(CONTENT, len(CONTENT))
     assert not editor.cursor_text_end()
@@ -140,6 +144,7 @@ def test_insert_at_cursor_cursor_at_start():
     assert editor.content == "ABC" + CONTENT
     assert editor.cursor_index == len("ABC")
 
+
 def test_insert_at_cursor_cursor_in_middle():
     start_cursor_index = 6
     editor = TextEditorBackend(CONTENT, start_cursor_index)
@@ -154,6 +159,7 @@ def test_insert_at_cursor_cursor_at_end():
     assert editor.content == CONTENT + "ABC"
     assert editor.cursor_index == len(editor.content)
 
+
 def test_get_range():
     editor = TextEditorBackend(CONTENT)
     assert editor.get_range(0, 5) == "Hello"

tests/test_unmount.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
-from textual.app import App, ComposeResult
 from textual import events
+from textual.app import App, ComposeResult
 from textual.containers import Container
 from textual.screen import Screen
 

tests/test_widget.py

@@ -5,7 +5,7 @@ from textual.app import App, ComposeResult
 from textual.css.errors import StyleValueError
 from textual.css.query import NoMatches
 from textual.geometry import Size
-from textual.widget import Widget, MountError
+from textual.widget import MountError, Widget
 from textual.widgets import Label
 
 

tests/test_widget_mount_point.py

@@ -1,6 +1,6 @@
 import pytest
 
-from textual.widget import Widget, MountError
+from textual.widget import MountError, Widget
 
 
 class Content(Widget):
@@ -12,7 +12,6 @@ class Body(Widget):
 
 
 def test_find_dom_spot():
-
     # Build up a "fake" DOM for an application.
     screen = Widget(name="Screen")
     header = Widget(name="Header", id="header")

tests/test_widget_mounting.py

@@ -1,9 +1,9 @@
 import pytest
 
 from textual.app import App
-from textual.widget import Widget, WidgetError, MountError
-from textual.widgets import Static
 from textual.css.query import TooManyMatches
+from textual.widget import MountError, Widget, WidgetError
+from textual.widgets import Static
 
 
 class SelfOwn(Widget):

tests/test_widget_removing.py

@@ -1,8 +1,9 @@
 import asyncio
+
 from textual.app import App
-from textual.widget import Widget
-from textual.widgets import Static, Button
 from textual.containers import Container
+from textual.widget import Widget
+from textual.widgets import Button, Static
 
 
 async def test_remove_single_widget():

tests/test_xterm_parser.py

@@ -5,13 +5,13 @@ import pytest
 
 from textual._xterm_parser import XTermParser
 from textual.events import (
-    Paste,
     Key,
     MouseDown,
-    MouseUp,
     MouseMove,
     MouseScrollDown,
     MouseScrollUp,
+    MouseUp,
+    Paste,
 )
 from textual.messages import TerminalSupportsSynchronizedOutput
 

tests/tree/test_tree_get_node_by_id.py

@@ -1,5 +1,7 @@
-import pytest
 from typing import cast
+
+import pytest
+
 from textual.widgets import Tree
 from textual.widgets._tree import NodeID
 

tests/tree/test_tree_messages.py

@@ -1,9 +1,10 @@
 from __future__ import annotations
 
 from typing import Any
+
 from textual.app import App, ComposeResult
-from textual.widgets import Tree
 from textual.message import Message
+from textual.widgets import Tree
 
 
 class MyTree(Tree[None]):

tests/tree/test_tree_node_children.py

@@ -1,4 +1,5 @@
 import pytest
+
 from textual.widgets import Tree
 from textual.widgets.tree import TreeNode
 

tests/tree/test_tree_node_label.py

@@ -1,6 +1,7 @@
+from rich.text import Text
+
 from textual.widgets import Tree
 from textual.widgets.tree import TreeNode
-from rich.text import Text
 
 
 def test_tree_node_label() -> None: