diff --git a/src/PIL/AniImagePlugin.py b/src/PIL/AniImagePlugin.py
index 9a30cfdc6..0b6cebf57 100644
--- a/src/PIL/AniImagePlugin.py
+++ b/src/PIL/AniImagePlugin.py
@@ -2,7 +2,6 @@ import struct
 from io import BytesIO
 
 from PIL import BmpImagePlugin, CurImagePlugin, Image, ImageFile
-from PIL._binary import i16le as i16
 from PIL._binary import i32le as i32
 from PIL._binary import o8
 from PIL._binary import o16le as o16
@@ -22,7 +21,7 @@ def _save_frame(im: Image.Image, fp: BytesIO, filename: str, info: dict):
     )
     h = im.encoderinfo.get("hotspots", [(0, 0) for i in range(len(s))])
 
-    if len(hotspots) != len(sizes):
+    if len(h) != len(s):
         raise ValueError("Number of hotspots must be equal to number of cursor sizes")
 
     # sort and remove duplicate sizes
@@ -185,7 +184,6 @@ def _write_multiple_frames(im: Image.Image, fp: BytesIO, filename: str):
 
         fp.seek(fram_end)
 
-    bmp = im.encoderinfo.get("bitmap_format") == "bmp"
     display_rate = im.encoderinfo.get("display_rate", 2)
     n_frames = len(frames)
     n_steps = len(seq) if seq else n_frames
diff --git a/src/PIL/CurImagePlugin.py b/src/PIL/CurImagePlugin.py
index 6c8ac58f0..2419b8cbf 100644
--- a/src/PIL/CurImagePlugin.py
+++ b/src/PIL/CurImagePlugin.py
@@ -39,7 +39,7 @@ def _save(im: Image.Image, fp: BytesIO, filename: str):
     )
     h = im.encoderinfo.get("hotspots", [(0, 0) for i in range(len(s))])
 
-    if len(hotspots) != len(sizes):
+    if len(h) != len(s):
         raise ValueError("Number of hotspots must be equal to number of cursor sizes")
 
     # sort and remove duplicate sizes
@@ -146,10 +146,11 @@ class CurFile(IcoImagePlugin.IcoFile):
             icon_header["dim"] = (icon_header["width"], icon_header["height"])
             icon_header["square"] = icon_header["width"] * icon_header["height"]
 
-            # TODO: This needs further investigation. Cursor files do not really specify their bpp
-            # like ICO's as those bits are used for the y_hotspot. For now, bpp is calculated by
-            # subtracting the AND mask (equal to number of pixels * 1bpp) and dividing by the number
-            # of pixels. This seems to work well so far.
+            # TODO: This needs further investigation. Cursor files do not really 
+            # specify their bpp like ICO's as those bits are used for the y_hotspot. 
+            # For now, bpp is calculated by subtracting the AND mask (equal to number 
+            # of pixels * 1bpp) and dividing by the number of pixels. This seems 
+            # to work well so far.
             BITMAP_INFO_HEADER_SIZE = 40
             bpp_without_and = (
                 (icon_header["size"] - BITMAP_INFO_HEADER_SIZE) * 8