fix error of sometimes having ints in cls_to_idx maps

ForNet.py

@@ -1134,9 +1134,17 @@ class RecombineDataset(Dataset):
                 for in_cls in bg_rat_indices:
                     if in_cls not in self.cls_to_idx:
                         self.cls_to_idx[in_cls] = []
-                    for idx, rat in bg_rat_indices[in_cls]:
-                        if rat < self.pruning_ratio:
-                            self.cls_to_idx[in_cls].append(idx)
+                    for data in bg_rat_indices[in_cls]:
+                        if isinstance(data, int):
+                            self.cls_to_idx[in_cls].append(data)
+                        elif isinstance(data, list):
+                            idx, rat = data
+                            if rat < self.pruning_ratio:
+                                self.cls_to_idx[in_cls].append(idx)
+                        else:
+                            raise TypeError(
+                                f"expected entries to be [int, float] (or int), but got {data} ({type(data )}"
+                            )
             except (TypeError, KeyError, OSError):
                 logger.warning(
                     f"Could not load background ratio indices from {bg_rat_indices}. Will do pruning and background selection on the fly. This will take more time in the first few epochs"
@@ -1476,7 +1484,6 @@ class ForNet(datasets.GeneratorBasedBuilder):
                     "bg_rat_idx_file": datasets.Value("string"),
                 }
             ),
-            supervised_keys=("image", "label"),
             homepage=_HOMEPAGE,
             citation=_CITATION,
         )
@@ -1541,6 +1548,9 @@ class ForNet(datasets.GeneratorBasedBuilder):
                         class_to_zipfile[name.split("/")[-2]] = f
                         file_ending = "pkl" if name.endswith(".pkl") else "pkl.gz"
                         name_start = "/".join(name.split("/")[:-2])
+        else:
+            name_start = ""
+            file_ending = "pkl" if patch_files[0].startswith("train") else "pkl.gz"
         if len(name_start) > 0:
             name_start += "/"
         logger.info(f"Loading extra information: {hf_indices}, {fg_bg_ratios}")
@@ -1629,7 +1639,7 @@ class ForNet(datasets.GeneratorBasedBuilder):
             in_cls = data["path"].split("/")[0]
             if in_cls not in cls_to_idx:
                 cls_to_idx[in_cls] = []
-            cls_to_idx[in_cls].append(foraug_idx)
+            cls_to_idx[in_cls].append((foraug_idx, data["fg/bg_area"]))
             yield foraug_idx, data
             foraug_idx += 1
         tqdm.write(f"Done generating {split} examples. Saving cls_to_idx file at '{cls_to_idx_loc}'.")
@@ -1793,4 +1803,3 @@ def _zip_loader(
                     "fg/bg_area": fg_bg_ratios[patch_name],
                 }
             )
-