add typing

src/PIL/IcnsImagePlugin.py

@@ -263,7 +263,7 @@ def _open(self) -> None:
         )
 
     @Image.Image.size.setter
-    def size(self, value):
+    def size(self, value: tuple[int, int]) -> None:
         info_size = value
         if info_size not in self.info["sizes"] and len(info_size) == 2:
             info_size = (info_size[0], info_size[1], 1)

src/PIL/IcoImagePlugin.py

@@ -309,7 +309,7 @@ def _open(self) -> None:
         self.load()
 
     @Image.Image.size.setter
-    def size(self, value):
+    def size(self, value: tuple[int, int]) -> None:
         if value not in self.info["sizes"]:
             msg = "This is not one of the allowed sizes of this image"
             raise ValueError(msg)

src/PIL/Image.py

@@ -532,7 +532,7 @@ def __init__(self):
         self.pyaccess = None
         self._exif = None
 
-    def _use_im_values(self):
+    def _use_im_values(self) -> bool:
         """
         Whether or not to try using values from self.im
         in addition to the values in this class.
@@ -553,27 +553,27 @@ def size(self) -> tuple[int, int]:
             return self.im.size
         return self.__size
 
-    def _size(self, value):
+    def _size(self, value: tuple[int, int]) -> None:
         # set im.size first in case it raises an exception
         if self._use_im_values():
             self.im.size = value
         self.__size = value
 
-    _size = property(fset=_size)
+    _size: tuple[int, int] = property(fset=_size)
 
     @property
-    def mode(self):
+    def mode(self) -> str:
         if self._use_im_values():
             return self.im.mode
         return self.__mode
 
-    def _mode(self, value):
+    def _mode(self, value: str) -> None:
         # set im.mode first in case it raises an exception
         if self._use_im_values():
             self.im.mode = value
         self.__mode = value
 
-    _mode = property(fset=_mode)
+    _mode: str = property(fset=_mode)
 
     def _new(self, im) -> Image:
         new = Image()

src/PIL/ImageFile.py

@@ -159,7 +159,7 @@ def get_format_mimetype(self):
         if self.format is not None:
             return Image.MIME.get(self.format.upper())
 
-    def _use_im_values(self):
+    def _use_im_values(self) -> bool:
         return self.tile is None and self.im is not None
 
     def __setstate__(self, state):