Update uspto2.py

uspto2.py

@@ -37,6 +37,14 @@ class PileDomainDataset(GeneratorBasedBuilder):
                     "split": None,
                 },
             ),
+            
+            datasets.SplitGenerator(
+                name="validation",
+                gen_kwargs={
+                    "data_dir": os.path.join(dl_path, "data/val"),
+                    "split": None,
+                },
+            ),
             datasets.SplitGenerator(
                 name="validation_pile",
                 gen_kwargs={