Annotate known magic-method return types (#9131)

stubs/Pillow/PIL/ImageMath.pyi

@@ -4,7 +4,7 @@ class _Operand:
     im: Any
     def __init__(self, im) -> None: ...
     def apply(self, op, im1, im2: Any | None = ..., mode: Any | None = ...): ...
-    def __bool__(self): ...
+    def __bool__(self) -> bool: ...
     def __abs__(self): ...
     def __pos__(self): ...
     def __neg__(self): ...

stubs/Pillow/PIL/ImageWin.pyi

@@ -3,12 +3,12 @@ from typing import Any
 class HDC:
     dc: Any
     def __init__(self, dc) -> None: ...
-    def __int__(self): ...
+    def __int__(self) -> int: ...
 
 class HWND:
     wnd: Any
     def __init__(self, wnd) -> None: ...
-    def __int__(self): ...
+    def __int__(self) -> int: ...
 
 class Dib:
     image: Any

stubs/Pillow/PIL/PdfParser.pyi

@@ -12,10 +12,10 @@ class PdfFormatError(RuntimeError): ...
 def check_format_condition(condition, error_message) -> None: ...
 
 class IndirectReference:
-    def __bytes__(self): ...
+    def __bytes__(self) -> bytes: ...
     def __eq__(self, other): ...
     def __ne__(self, other): ...
-    def __hash__(self): ...
+    def __hash__(self) -> int: ...
 
 class IndirectObjectDef(IndirectReference): ...
 
@@ -29,7 +29,7 @@ class XrefTable:
     def __getitem__(self, key): ...
     def __delitem__(self, key) -> None: ...
     def __contains__(self, key): ...
-    def __len__(self): ...
+    def __len__(self) -> int: ...
     def keys(self): ...
     def write(self, f): ...
 
@@ -38,14 +38,14 @@ class PdfName:
     def __init__(self, name) -> None: ...
     def name_as_str(self): ...
     def __eq__(self, other): ...
-    def __hash__(self): ...
+    def __hash__(self) -> int: ...
     @classmethod
     def from_pdf_stream(cls, data): ...
     allowed_chars: Any
-    def __bytes__(self): ...
+    def __bytes__(self) -> bytes: ...
 
 class PdfArray(list[Any]):
-    def __bytes__(self): ...
+    def __bytes__(self) -> bytes: ...
 
 class PdfDict(collections.UserDict[bytes, Any]):
     def __setattr__(self, key, value) -> None: ...
@@ -55,7 +55,7 @@ class PdfDict(collections.UserDict[bytes, Any]):
 class PdfBinary:
     data: Any
     def __init__(self, data) -> None: ...
-    def __bytes__(self): ...
+    def __bytes__(self) -> bytes: ...
 
 class PdfStream:
     dictionary: Any

stubs/Pillow/PIL/PyAccess.pyi

@@ -10,7 +10,7 @@ class PyAccess:
     image32: Any
     image: Any
     def __init__(self, img, readonly: bool = ...) -> None: ...
-    def __setitem__(self, xy, color): ...
+    def __setitem__(self, xy, color) -> None: ...
     def __getitem__(self, xy): ...
     putpixel: Any
     getpixel: Any

stubs/Pillow/PIL/TiffImagePlugin.pyi

@@ -59,7 +59,7 @@ class IFDRational(Rational):
     @property
     def denominator(a): ...
     def limit_rational(self, max_denominator): ...
-    def __hash__(self): ...
+    def __hash__(self) -> int: ...
     def __eq__(self, other): ...
     __add__: Any
     __radd__: Any
@@ -131,7 +131,7 @@ class ImageFileDirectory_v1(ImageFileDirectory_v2):
     def from_v2(cls, original): ...
     def to_v2(self): ...
     def __contains__(self, tag): ...
-    def __len__(self): ...
+    def __len__(self) -> int: ...
     def __iter__(self): ...
     def __setitem__(self, tag, value) -> None: ...
     def __getitem__(self, tag): ...