Rename SceneFileWriter.save_final_image() to save_image() (#4378)

* Rename save_final_image() to save_image()

* Rename SceneFileWriter.save_final_image() to save_image() and fix
  docstring

* fix some type annotations

* make docstrings consistent

* Update manim/scene/scene_file_writer.py

Co-authored-by: Francisco Manríquez Novoa <49853152+chopan050@users.noreply.github.com>

---------

Co-authored-by: Francisco Manríquez Novoa <49853152+chopan050@users.noreply.github.com>

Author: fmuenkel

manim/renderer/cairo_renderer.py

@@ -26,8 +26,13 @@
 class CairoRenderer:
     """A renderer using Cairo.
 
-    num_plays : Number of play() functions in the scene.
-    time: time elapsed since initialisation of scene.
+    Attributes
+    ----------
+    num_plays : int
+        Number of play() functions in the scene.
+
+    time : float
+        Time elapsed since initialisation of scene.
     """
 
     def __init__(
@@ -138,7 +143,6 @@ def update_frame(  # TODO Description in Docstring
         ignore_skipping
 
         **kwargs
-
         """
         if self.skip_animations and not ignore_skipping:
             return
@@ -160,20 +164,18 @@ def render(self, scene, time, moving_mobjects):
         self.add_frame(self.get_frame())
 
     def get_frame(self) -> PixelArray:
-        """
-        Gets the current frame as NumPy array.
+        """Gets the current frame as NumPy array.
 
         Returns
         -------
         np.array
             NumPy array of pixel values of each pixel in screen.
-            The shape of the array is height x width x 3
+            The shape of the array is height x width x 3.
         """
         return np.array(self.camera.pixel_array)
 
     def add_frame(self, frame: np.ndarray, num_frames: int = 1):
-        """
-        Adds a frame to the video_file_stream
+        """Adds a frame to the video_file_stream
 
         Parameters
         ----------
@@ -203,10 +205,7 @@ def freeze_current_frame(self, duration: float):
         )
 
     def show_frame(self):
-        """
-        Opens the current frame in the Default Image Viewer
-        of your system.
-        """
+        """Opens the current frame in the Default Image Viewer of your system."""
         self.update_frame(ignore_skipping=True)
         self.camera.get_image().show()
 
@@ -223,7 +222,7 @@ def save_static_frame_data(
         scene
             The scene played.
         static_mobjects
-            Static mobjects of the scene. If None, self.static_image is set to None
+            Static mobjects of the scene. If None, self.static_image is set to None.
 
         Returns
         -------
@@ -276,4 +275,4 @@ def scene_finished(self, scene: Scene) -> None:
         if config["save_last_frame"]:
             self.static_image = None
             self.update_frame(scene)
-            self.file_writer.save_final_image(self.camera.get_image())
+            self.file_writer.save_image(self.camera.get_image())

manim/renderer/opengl_renderer.py

@@ -403,8 +403,7 @@ def get_texture_id(self, path):
         return self.path_to_texture_id[repr(path)]
 
     def update_skipping_status(self) -> None:
-        """
-        This method is used internally to check if the current
+        """This method is used internally to check if the current
         animation needs to be skipped or not. It also checks if
         the number of animations that were played correspond to
         the number of animations that need to be played, and
@@ -506,7 +505,7 @@ def scene_finished(self, scene):
         if self.should_save_last_frame():
             config.save_last_frame = True
             self.update_frame(scene)
-            self.file_writer.save_final_image(self.get_image())
+            self.file_writer.save_image(self.get_image())
 
     def should_save_last_frame(self):
         if config["save_last_frame"]:

manim/scene/scene_file_writer.py

@@ -483,17 +483,16 @@ def write_frame(
             )
 
     def output_image(
-        self, image: Image.Image, target_dir: StrPath, ext: str, zero_pad: bool
+        self, image: Image.Image, target_dir: StrPath, ext: str, zero_pad: int
     ) -> None:
         if zero_pad:
             image.save(f"{target_dir}{str(self.frame_count).zfill(zero_pad)}{ext}")
         else:
             image.save(f"{target_dir}{self.frame_count}{ext}")
         self.frame_count += 1
 
-    def save_final_image(self, image: Image.Image) -> None:
-        """The name is a misnomer. This method saves the image
-        passed to it as an in the default image directory.
+    def save_image(self, image: Image.Image) -> None:
+        """This method saves the image passed to it in the default image directory.
 
         Parameters
         ----------