More strict mypy checking

mypy.ini

@@ -1,2 +1,3 @@
 [mypy]
 ignore_missing_imports = True
+strict = true

win2xcur/cursor.py

@@ -13,11 +13,11 @@ class CursorImage:
 
 
 class CursorFrame:
-    def __init__(self, images: List[CursorImage], delay=0) -> None:
+    def __init__(self, images: List[CursorImage], delay: int = 0) -> None:
         self.images = images
         self.delay = delay
 
-    def __getitem__(self, item) -> CursorImage:
+    def __getitem__(self, item: int) -> CursorImage:
         return self.images[item]
 
     def __len__(self) -> int:

win2xcur/main.py

@@ -5,6 +5,7 @@ import traceback
 from multiprocessing import cpu_count
 from multiprocessing.pool import ThreadPool
 from threading import Lock
+from typing import BinaryIO
 
 from win2xcur import shadow
 from win2xcur.parser import open_blob
@@ -37,7 +38,7 @@ def main() -> None:
 
     check_xcursorgen()
 
-    def process(file) -> None:
+    def process(file: BinaryIO) -> None:
         name = file.name
         blob = file.read()
         try:

win2xcur/parser/ani.py

@@ -20,6 +20,9 @@ class ANIParser(BaseParser):
 
     @classmethod
     def can_parse(cls, blob: bytes) -> bool:
+        signature: bytes
+        size: int
+        subtype: bytes
         signature, size, subtype = cls.RIFF_HEADER.unpack(blob[:cls.RIFF_HEADER.size])
         return signature == cls.SIGNATURE and size == len(blob) - 8 and subtype == cls.ANI_TYPE
 

win2xcur/shadow.py

@@ -22,7 +22,9 @@ def apply_to_image(image: BaseImage, *, color: str, radius: float, sigma: float,
     return result
 
 
-def apply_to_frames(frames: List[CursorFrame], **kwargs) -> None:
+def apply_to_frames(frames: List[CursorFrame], *, color: str, radius: float,
+                    sigma: float, xoffset: float, yoffset: float) -> None:
     for frame in frames:
         for cursor in frame:
-            cursor.image = apply_to_image(cursor.image, **kwargs)
+            cursor.image = apply_to_image(cursor.image, color=color, radius=radius,
+                                          sigma=sigma, xoffset=xoffset, yoffset=yoffset)