reverting back

my_metric.py

@@ -56,17 +56,23 @@ _CITATION = """
 
 
 @evaluate.utils.file_utils.add_start_docstrings(_DESCRIPTION, _KWARGS_DESCRIPTION)
-class my_metric(evaluate.Measurement):
+class my_metric(evaluate.Metric):
     def _info(self):
-        return evaluate.MeasurementInfo(
-            module_type="measurement",
+        return evaluate.MetricInfo(
             description=_DESCRIPTION,
             citation=_CITATION,
             inputs_description=_KWARGS_DESCRIPTION,
-            features=datasets.Features({
-                "generated_smiles": datasets.Value("string"),
-                "train_smiles": datasets.Value("string"),            
-            }),
+            features=datasets.Features(
+                {
+                    "generated_smiles": datasets.Sequence(datasets.Value("string")),
+                    "train_smiles": datasets.Sequence(datasets.Value("string")),
+                }
+                if self.config_name == "multilabel"
+                else {
+                    "generated_smiles": datasets.Value("string"),
+                    "train_smiles": datasets.Value("string"),
+                }
+            ),
                 
             reference_urls=["https://github.com/molecularsets/moses", "https://tdcommons.ai/functions/oracles/"],
         )