update 'None' case (colab exeception)

daiso.py

@@ -1389,7 +1389,7 @@ class DAISO(datasets.GeneratorBasedBuilder):
         features = {feature: datasets.Value("string") for feature in self.config.features}
         if self.config.label_classes:
             features["Label"] = datasets.features.ClassLabel(names=list(
-                set(['OOD' if label == 'null' or label is None else label for label in
+                set(['OOD' if label == 'null' or label is None or label == 'None' else label for label in
                      list(self.config.label_classes.keys())])
             ))
             features["Label_ISO"] = datasets.features.ClassLabel(