添加 a.py

a.py

@@ -0,0 +1,31 @@
+class ImageDataset(Dataset):
+    def __init__(self, data_path, mode,  transform=None):
+        self.path=data_path
+        data_dir=pathlib.Path(data_path)
+        self.mode=mode
+        self.transform=transform
+        self.image_path=list(data_dir.glob("NWPU-RESISC45/*/*"))
+        self.image_path=[str(path) for path in self.image_path]
+        random.seed(1)
+        random.shuffle(self.image_path)
+        if self.mode == 'database':
+            self.image_path=self.image_path[12000:]
+        elif self.mode == 'test':
+            self.image_path=self.image_path[7000:12000]
+        else:
+            self.image_path=self.image_path[:7000]
+        lable_names = sorted(item.name for item in data_dir.glob("NWPU-RESISC45/*/"))
+        lable_to_index = dict((name, index) for index, name in enumerate(lable_names))
+        self.image_label=[lable_to_index[pathlib.Path(path).parent.name] for path in self.image_path]
+
+
+    def __getitem__(self, index):
+        img = Image.open(os.path.join(self.path, self.image_path[index]))
+        img = img.convert('RGB')
+        if self.transform is not None:
+            img = self.transform(img)
+        label = torch.LongTensor([self.image_label[index]])
+        return img, label, index
+
+    def __len__(self):
+        return len(self.image_path)