Change flake8-comprehensions and flake8-bugbear to ruff

.pre-commit-config.yaml

@@ -32,9 +32,7 @@ repos:
       - id: flake8
         additional_dependencies:
           [
-            flake8-bugbear==21.4.3,
             flake8-builtins==1.5.3,
-            flake8-comprehensions>=3.6.1,
             flake8-docstrings==1.6.0,
             flake8-pytest-style==1.5.0,
             flake8-rst-docstrings==0.2.3,

manim/_config/utils.py

@@ -643,14 +643,14 @@ def digest_parser(self, parser: configparser.ConfigParser) -> Self:
         gui_location = tuple(
             map(int, re.split(r"[;,\-]", parser["CLI"]["gui_location"])),
         )
-        setattr(self, "gui_location", gui_location)
+        self.gui_location = gui_location
 
         window_size = parser["CLI"][
             "window_size"
         ]  # if not "default", get a tuple of the position
         if window_size != "default":
             window_size = tuple(map(int, re.split(r"[;,\-]", window_size)))
-        setattr(self, "window_size", window_size)
+        self.window_size = window_size
 
         # plugins
         plugins = parser["CLI"].get("plugins", fallback="", raw=True)
@@ -671,7 +671,7 @@ def digest_parser(self, parser: configparser.ConfigParser) -> Self:
 
         val = parser["CLI"].get("progress_bar")
         if val:
-            setattr(self, "progress_bar", val)
+            self.progress_bar = val
 
         val = parser["ffmpeg"].get("loglevel")
         if val:
@@ -681,11 +681,11 @@ def digest_parser(self, parser: configparser.ConfigParser) -> Self:
             val = parser["jupyter"].getboolean("media_embed")
         except ValueError:
             val = None
-        setattr(self, "media_embed", val)
+        self.media_embed = val
 
         val = parser["jupyter"].get("media_width")
         if val:
-            setattr(self, "media_width", val)
+            self.media_width = val
 
         val = parser["CLI"].get("quality", fallback="", raw=True)
         if val:
@@ -836,15 +836,12 @@ def digest_args(self, args: argparse.Namespace) -> Self:
         if args.tex_template:
             self.tex_template = TexTemplate.from_file(args.tex_template)
 
-        if (
-            self.renderer == RendererType.OPENGL
-            and getattr(args, "write_to_movie") is None
-        ):
+        if self.renderer == RendererType.OPENGL and args.write_to_movie is None:
             # --write_to_movie was not passed on the command line, so don't generate video.
             self["write_to_movie"] = False
 
         # Handle --gui_location flag.
-        if getattr(args, "gui_location") is not None:
+        if args.gui_location is not None:
             self.gui_location = args.gui_location
 
         return self

manim/cli/cfg/group.py

@@ -196,7 +196,7 @@ def write(level: str = None, openfile: bool = False) -> None:
                         """Not enough values in input.
 You may have added a new entry to default.cfg, in which case you will have to
 modify write_cfg_subcmd_input to account for it.""",
-                    )
+                    ) from None
                 if temp:
                     while temp and not _is_expected_datatype(
                         temp,

manim/cli/default_group.py

@@ -67,6 +67,7 @@ def command(self, *args, **kwargs):
         warnings.warn(
             "Use default param of DefaultGroup or set_default_command() instead",
             DeprecationWarning,
+            stacklevel=1,
         )
 
         def _decorator(f):

manim/mobject/geometry/arc.py

@@ -400,7 +400,9 @@ def get_arc_center(self, warning: bool = True) -> Point3D:
             return line_intersection(line1=(a1, a1 + n1), line2=(a2, a2 + n2))
         except Exception:
             if warning:
-                warnings.warn("Can't find Arc center, using ORIGIN instead")
+                warnings.warn(
+                    "Can't find Arc center, using ORIGIN instead", stacklevel=1
+                )
             self._failed_to_get_center = True
             return np.array(ORIGIN)
 

manim/mobject/geometry/boolean_ops.py

@@ -90,7 +90,7 @@ def _convert_vmobject_to_skia_path(self, vmobject: VMobject) -> SkiaPath:
                 quads = vmobject.get_bezier_tuples_from_points(subpath)
                 start = subpath[0]
                 path.moveTo(*start[:2])
-                for p0, p1, p2 in quads:
+                for _p0, p1, p2 in quads:
                     path.quadTo(*p1[:2], *p2[:2])
                 if vmobject.consider_points_equals(subpath[0], subpath[-1]):
                     path.close()
@@ -100,7 +100,7 @@ def _convert_vmobject_to_skia_path(self, vmobject: VMobject) -> SkiaPath:
                 quads = vmobject.gen_cubic_bezier_tuples_from_points(subpath)
                 start = subpath[0]
                 path.moveTo(*start[:2])
-                for p0, p1, p2, p3 in quads:
+                for _p0, p1, p2, p3 in quads:
                     path.cubicTo(*p1[:2], *p2[:2], *p3[:2])
 
                 if vmobject.consider_points_equals_2d(subpath[0], subpath[-1]):

manim/mobject/graph.py

@@ -469,11 +469,11 @@ def _determine_graph_layout(
             return cast(LayoutFunction, layout)(
                 nx_graph, scale=layout_scale, **layout_config
             )
-        except TypeError:
+        except TypeError as e:
             raise ValueError(
                 f"The layout '{layout}' is neither a recognized layout, a layout function,"
                 "nor a vertex placement dictionary.",
-            )
+            ) from e
 
 
 class GenericGraph(VMobject, metaclass=ConvertToOpenGL):

manim/mobject/opengl/opengl_point_cloud_mobject.py

@@ -71,7 +71,7 @@ def thin_out(self, factor=5):
         for mob in self.family_members_with_points():
             num_points = mob.get_num_points()
 
-            def thin_func():
+            def thin_func(num_points=num_points):
                 return np.arange(0, num_points, factor)
 
             if len(mob.points) == len(mob.rgbas):

manim/mobject/svg/brace.py

@@ -249,7 +249,7 @@ def __init__(
         self.brace = Brace(obj, brace_direction, buff, **brace_config)
 
         if isinstance(text, (tuple, list)):
-            self.label = self.label_constructor(font_size=font_size, *text, **kwargs)
+            self.label = self.label_constructor(*text, font_size=font_size, **kwargs)
         else:
             self.label = self.label_constructor(str(text), font_size=font_size)
 

manim/mobject/text/text_mobject.py

@@ -1453,7 +1453,9 @@ def _extract_gradient_tags(self):
                     "end_offset": end_offset,
                 },
             )
-        self.text = re.sub("<gradient[^>]+>(.+?)</gradient>", r"\1", self.text, 0, re.S)
+        self.text = re.sub(
+            "<gradient[^>]+>(.+?)</gradient>", r"\1", self.text, count=0, flags=re.S
+        )
         return gradientmap
 
     def _parse_color(self, col):
@@ -1495,7 +1497,9 @@ def _extract_color_tags(self):
                     "end_offset": end_offset,
                 },
             )
-        self.text = re.sub("<color[^>]+>(.+?)</color>", r"\1", self.text, 0, re.S)
+        self.text = re.sub(
+            "<color[^>]+>(.+?)</color>", r"\1", self.text, count=0, flags=re.S
+        )
         return colormap
 
     def __repr__(self):

manim/mobject/types/point_cloud_mobject.py

@@ -148,7 +148,7 @@ def thin_out(self, factor=5):
         for mob in self.family_members_with_points():
             num_points = self.get_num_points()
             mob.apply_over_attr_arrays(
-                lambda arr: arr[np.arange(0, num_points, factor)],
+                lambda arr, n=num_points: arr[np.arange(0, n, factor)],
             )
         return self
 
@@ -158,7 +158,7 @@ def sort_points(self, function=lambda p: p[0]):
         """
         for mob in self.family_members_with_points():
             indices = np.argsort(np.apply_along_axis(function, 1, mob.points))
-            mob.apply_over_attr_arrays(lambda arr: arr[indices])
+            mob.apply_over_attr_arrays(lambda arr, idx=indices: arr[idx])
         return self
 
     def fade_to(self, color, alpha, family=True):

manim/scene/scene.py

@@ -899,16 +899,16 @@ def compile_animations(
         for arg in arg_anims:
             try:
                 animations.append(prepare_animation(arg))
-            except TypeError:
+            except TypeError as e:
                 if inspect.ismethod(arg):
                     raise TypeError(
                         "Passing Mobject methods to Scene.play is no longer"
                         " supported. Use Mobject.animate instead.",
-                    )
+                    ) from e
                 else:
                     raise TypeError(
                         f"Unexpected argument {arg} passed to Scene.play().",
-                    )
+                    ) from e
 
         for animation in animations:
             for k, v in kwargs.items():

manim/scene/three_d_scene.py

@@ -135,8 +135,8 @@ def begin_ambient_camera_rotation(self, rate: float = 0.02, about: str = "theta"
                 }
                 cam.add_updater(lambda m, dt: methods[about](rate * dt))
                 self.add(self.camera)
-        except Exception:
-            raise ValueError("Invalid ambient rotation angle.")
+        except Exception as e:
+            raise ValueError("Invalid ambient rotation angle.") from e
 
     def stop_ambient_camera_rotation(self, about="theta"):
         """
@@ -155,8 +155,8 @@ def stop_ambient_camera_rotation(self, about="theta"):
                 self.remove(x)
             elif config.renderer == RendererType.OPENGL:
                 self.camera.clear_updaters()
-        except Exception:
-            raise ValueError("Invalid ambient rotation angle.")
+        except Exception as e:
+            raise ValueError("Invalid ambient rotation angle.") from e
 
     def begin_3dillusion_camera_rotation(
         self,

manim/utils/hashing.py

@@ -223,7 +223,7 @@ def default(self, obj: Any):
             # We return the repr and not a list to avoid the JsonEncoder to iterate over it.
             return repr(obj)
         elif hasattr(obj, "__dict__"):
-            temp = getattr(obj, "__dict__")
+            temp = obj.__dict__
             # MappingProxy is scene-caching nightmare. It contains all of the object methods and attributes. We skip it as the mechanism will at some point process the object, but instantiated.
             # Indeed, there is certainly no case where scene-caching will receive only a non instancied object, as this is never used in the library or encouraged to be used user-side.
             if isinstance(temp, MappingProxyType):

manim/utils/testing/_frames_testers.py

@@ -64,7 +64,8 @@ def check_frame(self, frame_number: int, frame: np.ndarray):
                 warnings.warn(
                     f"Mismatch of {number_of_mismatches} pixel values in frame {frame_number} "
                     f"against control data in {self._file_path}. Below error threshold, "
-                    "continuing..."
+                    "continuing...",
+                    stacklevel=1,
                 )
                 return
 

manim/utils/testing/_test_class_makers.py

@@ -15,7 +15,7 @@ def _make_test_scene_class(
 ) -> type[Scene]:
     class _TestedScene(base_scene):
         def __init__(self, *args, **kwargs):
-            super().__init__(renderer=test_renderer, *args, **kwargs)
+            super().__init__(*args, renderer=test_renderer, **kwargs)
 
         def construct(self):
             construct_test(self)

manim/utils/testing/frames_comparison.py

@@ -150,7 +150,7 @@ def wrapper(*args, request: FixtureRequest, tmp_path, **kwargs):
 
         # Reach a bit into pytest internals to hoist the marks from our wrapped
         # function.
-        setattr(wrapper, "pytestmark", [])
+        wrapper.pytestmark = []
         new_marks = getattr(tested_scene_construct, "pytestmark", [])
         wrapper.pytestmark = new_marks
         return wrapper

manim/utils/tex.py

@@ -191,7 +191,7 @@ def _texcode_for_environment(environment: str) -> tuple[str, str]:
         begin += "}"
 
     # While the \end command terminates at the first closing brace
-    split_at_brace = re.split("}", environment, 1)
+    split_at_brace = re.split("}", environment, maxsplit=1)
     end = r"\end{" + split_at_brace[0] + "}"
 
     return begin, end

pyproject.toml

@@ -64,9 +64,7 @@ gui = ["dearpygui"]
 [tool.poetry.group.dev.dependencies]
 black = ">=23.11,<25.0"
 flake8 = "^6.1.0"
-flake8-bugbear = "^23.11.28"
 flake8-builtins = "^2.2.0"
-flake8-comprehensions = "^3.7.0"
 flake8-docstrings = "^1.7.0"
 furo = "^2023.09.10"
 gitpython = "^3"
@@ -133,6 +131,8 @@ fix = true
 
 [tool.ruff.lint]
 select = [
+  "B",
+  "C4",
   "E",
   "F",
   "I",
@@ -142,6 +142,11 @@ select = [
 ]
 
 ignore = [
+  # mutable argument defaults (too many changes)
+  "B006",
+  # No function calls in defaults
+  # ignored because np.array() and straight_path()
+  "B008",
   # due to the import * used in manim
   "F403",
   "F405",
@@ -161,6 +166,8 @@ dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
 
 [tool.ruff.lint.per-file-ignores]
 "tests/*" = [
+  # unused expression
+  "B018",
   # unused variable
   "F841",
   # from __future__ import annotations