try fixing generate_tables

binding_affinity.py

@@ -164,9 +164,8 @@ class BindingAffinity(datasets.ArrowBasedBuilder):
                 "affinity_uM": row["affinity_uM"],
             }
 
-    def _generate_tables(self, files):
-        for i, file in enumerate(files):
-            df = pd.read_parquet(
-                file
-            )
-            yield i, df
+    def _generate_tables(
+        self, filepath, split  # method parameters are unpacked from `gen_kwargs` as given in `_split_generators`
+    ):
+        df = pd.read_parquet(filepath)
+        return df