Add type annotations to text_mobject.py

manim/mobject/text/tex_mobject.py

@@ -523,7 +523,9 @@ def fade_all_but(self, index_or_string: int | str, opacity: float = 0.5) -> None
         if isinstance(arg, str):
             part: VGroup | VMobject | None = self.get_part_by_tex(arg)
             if part is None:
-                raise Exception(f"Could not locate part by provided tex string '{arg}'.")
+                raise Exception(
+                    f"Could not locate part by provided tex string '{arg}'."
+                )
         elif isinstance(arg, int):
             part = self.submobjects[arg]
         else:

manim/mobject/text/text_mobject.py

@@ -726,16 +726,16 @@ def _get_settings_from_gradient(
         settings = []
         args = copy.copy(default_args)
         if self.gradient:
-            colors = color_gradient(self.gradient, len(self.text))
+            colors: list[ManimColor] = color_gradient(self.gradient, len(self.text))
             for i in range(len(self.text)):
                 args["color"] = colors[i].to_hex()
                 settings.append(TextSetting(i, i + 1, **args))
 
         for word, gradient in self.t2g.items():
             colors = (
                 color_gradient(gradient, len(word))
-                if len(gradient) != 1
-                else len(word) * list(gradient)
+                if len(list(gradient)) != 1
+                else len(word) * [ManimColor(gradient)]
             )
             for start, end in self._find_indexes(word, self.text):
                 for i in range(start, end):