fixes

bernice-pretrain-data.py

@@ -113,7 +113,7 @@ class BernicePretrainData(datasets.GeneratorBasedBuilder):
         # dl_manager is a datasets.download.DownloadManager that can be used to download and extract URLS
         # It can accept any type or nested list/dict and will give back the same structure with the url replaced with path to local files.
         # By default the archives will be extracted and a path to a cached folder where they are extracted is returned instead of the archive
-        data_url = f"{self._BASE_DATA_URL}/{self.config.name}"
+        data_url = f"{_BASE_DATA_URL}/{self.config.name}"
         print(f"{data_url=}")
         print(f"{os.listdir()}")
         urls_to_download = [f"{data_url}/{f}" for f in os.listdir(data_url)]