Add labels to polarity config.

bpsad.py

@@ -19,6 +19,8 @@ import os
 import datasets
 import sys
 
+from datasets import ClassLabel
+
 csv.field_size_limit(sys.maxsize)
 
 
@@ -97,7 +99,10 @@ class BPSAD(datasets.GeneratorBasedBuilder):
         if self.config.name == "polarity":
             features = datasets.Features({
                 "review_text": datasets.Value("string"),
-                "polarity": datasets.Value("int8"),
+                "polarity": ClassLabel(
+                    num_classes=2,
+                    names=['negative', 'positive']
+                ),
             })
         else:
             features = datasets.Features({