black

src/textual/renderables/sparkline.py

@@ -14,6 +14,7 @@ T = TypeVar("T", int, float)
 
 SummaryFunction = Callable[[Sequence[T]], float]
 
+
 class Sparkline(Generic[T]):
     """A sparkline representing a series of data.
 
@@ -100,7 +101,13 @@ if __name__ == "__main__":
     def last(l: Sequence[T]) -> T:
         return l[-1]
 
-    funcs: Sequence[SummaryFunction[int]] = (min, max, last, statistics.median, statistics.mean)
+    funcs: Sequence[SummaryFunction[int]] = (
+        min,
+        max,
+        last,
+        statistics.median,
+        statistics.mean,
+    )
     nums = [10, 2, 30, 60, 45, 20, 7, 8, 9, 10, 50, 13, 10, 6, 5, 4, 3, 7, 20]
     console.print(f"data = {nums}\n")
     for f in funcs:

src/textual/renderables/text_opacity.py

@@ -63,8 +63,7 @@ class TextOpacity:
         _from_color = Style.from_color
         if opacity == 0:
             for text, style, control in cast(
-                Iterable[tuple[str, Style, object]],
-                segments
+                Iterable[tuple[str, Style, object]], segments
             ):
                 assert style is not None
                 invisible_style = _from_color(bgcolor=style.bgcolor)

src/textual/widgets/_tree.py

@@ -628,7 +628,9 @@ class Tree(Generic[TreeDataType], ScrollView, can_focus=True):
 
         root = self.root
 
-        def add_node(path: list[TreeNode[TreeDataType]], node: TreeNode[TreeDataType], last: bool) -> None:
+        def add_node(
+            path: list[TreeNode[TreeDataType]], node: TreeNode[TreeDataType], last: bool
+        ) -> None:
             child_path = [*path, node]
             node._line = len(lines)
             add_line(TreeLine(child_path, last))