Remove broken URLs to genome sequences

multi_species_genomes.py

@@ -127,9 +127,9 @@ class MultiSpeciesGenomes(datasets.GeneratorBasedBuilder):
 
     def _split_generators(self, dl_manager: datasets.DownloadManager) -> List[datasets.SplitGenerator]:
 
-        urls_file = dl_manager.download_and_extract('urls.csv')
-        urls_df = pd.read_csv(urls_file)
-        urls = list(urls_df['URL'])
+        urls_filepath = dl_manager.download_and_extract('urls.txt')
+        with open(urls_filepath) as urls_file:
+            urls = [line.rstrip() for line in urls_file]
         
         test_urls = urls[-50:]   # 50 genomes for test set
         validation_urls = urls[-100:-50]  # 50 genomes for validation set