Update scripts/data.py

scripts/data.py

@@ -16,10 +16,12 @@ import torch
 
 import datasets
 
-class SlideFeaturesDataset:
+class SlideFeaturesDataset(torch.utils.data.Dataset):
     """Slide features dataset."""
     def __init__(self, *args, **kwargs):
         self.hf_dataset = datasets.load_dataset(*args, **kwargs).with_format("torch")
+        self.features = self.hf_dataset["features"]
+        self.labels = self.hf_dataset["label"]
 
     def __getitem__(self, item: np.int64) -> Tuple[torch.Tensor, torch.Tensor]:
         """
@@ -31,12 +33,9 @@ class SlideFeaturesDataset:
         Returns
         -------
         Tuple[torch.Tensor, torch.Tensor]
-            (1000, 768), ()
+            (1000, 768), (1)
         """
-        return (
-            self.hf_dataset[int(item)]["features"],
-            self.hf_dataset[int(item)]["label"].unsqueeze(0).float()
-        )
+        return (self.features[item], self.labels.unsqueeze(0).float())
 
     def __len__(self) -> int:
         return len(self.hf_dataset)