Update esc50-script.py

esc50-script.py

@@ -170,12 +170,12 @@ class ESC50(datasets.GeneratorBasedBuilder):
     def _generate_examples(self, data_dir, split):
         _, _walker = fast_scandir(data_dir, [EXTENSION], recursive=True)
 
-        test_fold = self.config.name
-        train_fold = [f'fold{f}' for f in range(1, 11)]
-        train_fold.remove(test_fold)
-
         for idx, fileid in enumerate(_walker):
             fold = default_find_fold(fileid)
+            test_fold = self.config.name
+            train_fold = [f'fold{f}' for f in range(1, 11)]
+            train_fold.remove(test_fold)
+            
             if split == 'train' and f'fold{fold}' in train_fold:
                 yield idx, {
                     'file': fileid,