Update riscbac.py

riscbac.py

@@ -108,5 +108,5 @@ class RISCBAC(datasets.GeneratorBasedBuilder):
     def _generate_examples(self, files_dir_path, split):
         files = os.listdir(files_dir_path)
         for key, file in enumerate(files):
-            with open(file, "r") as f:
+            with open(os.path.join(files_dir_path, file), "r", encoding="utf-8") as f:
                 yield key, {"text": f.readlines()}