Update test_ldkp.py

test_ldkp.py

@@ -62,8 +62,8 @@ class TestLDKP(datasets.GeneratorBasedBuilder):
         if self.config.name == "ldkp":  # This is the name of the configuration selected in BUILDER_CONFIGS above
             features = datasets.Features(
                 {
-                    "text": list([]),
-                    "BIO_tags": list([])
+                    "text": None,
+                    "BIO_tags": None
                     #"text": datasets.Value("string"),
                     #"BIO_tags": datasets.Value("string")
                     # "answer": datasets.Value("string")