Added missing typing annotations in dataset __getitem__ (#6843)

* style: Fixed typing of dataset __getitem__

* style: Fixed last missing typing
Co-authored-by: Philip Meier <github.pmeier@posteo.de>

torchvision/datasets/dtd.py

 import os
 import pathlib
-from typing import Callable, Optional
+from typing import Any, Callable, Optional, Tuple
 
 import PIL.Image
 
@@ -76,7 +76,7 @@ class DTD(VisionDataset):
     def __len__(self) -> int:
         return len(self._image_files)
 
-    def __getitem__(self, idx):
+    def __getitem__(self, idx: int) -> Tuple[Any, Any]:
         image_file, label = self._image_files[idx], self._labels[idx]
         image = PIL.Image.open(image_file).convert("RGB")
 

torchvision/datasets/fgvc_aircraft.py

@@ -90,7 +90,7 @@ class FGVCAircraft(VisionDataset):
     def __len__(self) -> int:
         return len(self._image_files)
 
-    def __getitem__(self, idx) -> Tuple[Any, Any]:
+    def __getitem__(self, idx: int) -> Tuple[Any, Any]:
         image_file, label = self._image_files[idx], self._labels[idx]
         image = PIL.Image.open(image_file).convert("RGB")
 

torchvision/datasets/flowers102.py

@@ -76,7 +76,7 @@ class Flowers102(VisionDataset):
     def __len__(self) -> int:
         return len(self._image_files)
 
-    def __getitem__(self, idx) -> Tuple[Any, Any]:
+    def __getitem__(self, idx: int) -> Tuple[Any, Any]:
         image_file, label = self._image_files[idx], self._labels[idx]
         image = PIL.Image.open(image_file).convert("RGB")
 

torchvision/datasets/food101.py

@@ -69,7 +69,7 @@ class Food101(VisionDataset):
     def __len__(self) -> int:
         return len(self._image_files)
 
-    def __getitem__(self, idx) -> Tuple[Any, Any]:
+    def __getitem__(self, idx: int) -> Tuple[Any, Any]:
         image_file, label = self._image_files[idx], self._labels[idx]
         image = PIL.Image.open(image_file).convert("RGB")
 

torchvision/datasets/rendered_sst2.py

@@ -59,7 +59,7 @@ class RenderedSST2(VisionDataset):
     def __len__(self) -> int:
         return len(self._samples)
 
-    def __getitem__(self, idx) -> Tuple[Any, Any]:
+    def __getitem__(self, idx: int) -> Tuple[Any, Any]:
         image_file, label = self._samples[idx]
         image = PIL.Image.open(image_file).convert("RGB")
 

torchvision/datasets/sun397.py

@@ -55,7 +55,7 @@ class SUN397(VisionDataset):
     def __len__(self) -> int:
         return len(self._image_files)
 
-    def __getitem__(self, idx) -> Tuple[Any, Any]:
+    def __getitem__(self, idx: int) -> Tuple[Any, Any]:
         image_file, label = self._image_files[idx], self._labels[idx]
         image = PIL.Image.open(image_file).convert("RGB")