Nit

wiki_dpr.py

@@ -166,17 +166,23 @@ class WikiDpr(datasets.ArrowBasedBuilder):
     def _download_post_processing_resources(self, split, resource_name, dl_manager):
         if resource_name == "embeddings_index":
             try:
-                if not self.config.dummy:
-                    index_file = os.path.join(
-                        "data",
-                        self.config.wiki_split,
-                        self.config.embeddings_name,
-                        os.path.basename(self.config.index_file.format(split=split).split(".", 2)[-1])
-                    )
-                    downloaded_resources = dl_manager.download_and_extract(
-                        {"embeddings_index": index_file}
-                    )
-                    return downloaded_resources["embeddings_index"]
+                embeddings_name = self.config.embeddings_name
+                if self.config.dummy:
+                    embeddings_name = "dummy." + embeddings_name
+                index_file = os.path.join(
+                    "data",
+                    self.config.wiki_split,
+                    self.config.embeddings_name,
+                    (
+                        "HNSW128_SQ8-IP-{split}.faiss"
+                        if self.config.index_name == "exaxt"
+                        else "IVF4096_HNSW128_PQ128-IP-{split}.faiss"
+                    ).format(split=split)
+                )
+                downloaded_resources = dl_manager.download_and_extract(
+                    {"embeddings_index": index_file}
+                )
+                return downloaded_resources["embeddings_index"]
             except (FileNotFoundError, ConnectionError):  # index doesn't exist
                 pass