:new: Added loader

loader.py

@@ -0,0 +1,33 @@
+from typing import List, Tuple
+
+import h5py
+import numpy as np
+
+
+def loader(
+    hdf5_file: str, folds: List[int]
+) -> Tuple[np.ndarray, np.ndarray, np.ndarray, List[str]]:
+    post = []
+    pre = []
+    masks = []
+    names = []
+
+    # Read hdf5 file and filter by fold
+    with h5py.File(hdf5_file, "r") as f:
+        for uuid, values in f.items():
+            if values.attrs["fold"] not in folds:
+                continue
+            if "pre_fire" not in values:
+                continue
+
+            post.append(values["post_fire"][...])
+            pre.append(values["pre_fire"][...])
+            masks.append(values["mask"][...])
+            names.append(uuid)
+
+    # Convert to numpy arrays
+    post = np.stack(post, axis=0, dtype=np.int32)
+    pre = np.stack(pre, axis=0, dtype=np.int32)
+    masks = np.stack(masks, axis=0, dtype=np.int32)
+
+    return post, pre, masks, names