Fixing various type errors

Error count: 97 -> 90

manim/camera/multi_camera.py

@@ -5,7 +5,7 @@
 __all__ = ["MultiCamera"]
 
 
-from manim.mobject.types.image_mobject import ImageMobject
+from manim.mobject.types.image_mobject import ImageMobject, ImageMobjectFromCamera
 
 from ..camera.moving_camera import MovingCamera
 from ..utils.iterables import list_difference_update
@@ -38,7 +38,9 @@ def __init__(
         )
         super().__init__(**kwargs)
 
-    def add_image_mobject_from_camera(self, image_mobject_from_camera: ImageMobject):
+    def add_image_mobject_from_camera(
+        self, image_mobject_from_camera: ImageMobjectFromCamera
+    ):
         """Adds an ImageMobject that's been obtained from the camera
         into the list ``self.image_mobject_from_cameras``
 

manim/scene/scene.py

@@ -1814,7 +1814,7 @@ def mouse_drag_orbit_controls(
             )
             self.camera_target += total_shift_vector
 
-    def set_key_function(self, char: int, func: Callable[[None], Any]) -> None:
+    def set_key_function(self, char: str, func: Callable[[None], Any]) -> None:
         self.key_to_function_map[char] = func
 
     def on_mouse_press(

manim/scene/scene_file_writer.py

@@ -14,7 +14,7 @@
 
 import av
 import numpy as np
-import srt
+import srt  # type: ignore[import-untyped]
 from PIL import Image
 from pydub import AudioSegment
 

manim/scene/three_d_scene.py

@@ -31,6 +31,8 @@
 if TYPE_CHECKING:
     from typing_extensions import Any
 
+    from ..renderer.opengl_renderer import OpenGLCamera
+
 
 class ThreeDScene(Scene):
     """
@@ -133,7 +135,7 @@ def begin_ambient_camera_rotation(
                 x.add_updater(lambda m, dt: x.increment_value(rate * dt))
                 self.add(x)
             elif config.renderer == RendererType.OPENGL:
-                cam: ThreeDCamera = self.camera
+                cam: OpenGLCamera = self.camera
                 methods = {
                     "theta": cam.increment_theta,
                     "phi": cam.increment_phi,
@@ -263,7 +265,6 @@ def move_camera(
         anims = []
 
         if config.renderer == RendererType.CAIRO:
-            self.camera: ThreeDCamera
             value_tracker_pairs = [
                 (phi, self.camera.phi_tracker),
                 (theta, self.camera.theta_tracker),

manim/scene/vector_space_scene.py

@@ -724,7 +724,8 @@ def add_background_mobject(self, *mobjects: Mobject) -> None:
         """
         self.add_special_mobjects(self.background_mobjects, *mobjects)
 
-    # TODO, this conflicts with Scene.add_fore
+    # TODO, this conflicts with Scene.add_foreground_mobject
+    # Please be aware that there is also the method Scene.add_foreground_mobjects.
     def add_foreground_mobject(self, *mobjects: Mobject) -> None:
         """
         Adds the mobjects to the special list

manim/scene/zoomed_scene.py

@@ -150,6 +150,7 @@ def activate_zooming(self, animate: bool = False) -> None:
             of the zoomed camera.
         """
         self.zoom_activated = True
+        assert isinstance(self.renderer.camera, MultiCamera)
         self.renderer.camera.add_image_mobject_from_camera(self.zoomed_display)
         if animate:
             self.play(self.get_zoom_in_animation())