Update NST.py

NST.py

@@ -239,7 +239,7 @@ class Nst(datasets.GeneratorBasedBuilder):
         data_fields.remove("lang_code")
         data_fields.remove("microphone_position")
         for metadata_path, archive_path in filepaths:
-            mic = "close" if metadata_file.name else "distant"
+            mic = "close" if metadata_path else "distant"
             metadata = {}
             with open(metadata_path) as metadata_file:
                 for line in metadata_file.read().split("\n"):