Update testb.py

testb.py

@@ -41,6 +41,15 @@ class TestB(datasets.GeneratorBasedBuilder):
             name="data2",
             data_url="./data2",
         )]
+
+     def _info(self):
+        features = {feature: datasets.Value("string") for feature in self.config.features}
+
+        return datasets.DatasetInfo(
+            description='desc',
+            features=datasets.Features(features),
+        )
+         
     def _generate_examples(self, data_file, split):
         with open(data_file, encoding="utf-8") as f:
             for line in f: