working now?

data/wmt/splits.txt

@@ -0,0 +1,4 @@
+train
+dev
+test_2014
+test_2019

wsdmt.py

@@ -70,26 +70,25 @@ class WSDMTDataset(datasets.GeneratorBasedBuilder):
         )
 
     def _split_generators(self, dl_manager: DownloadManager):
+        splits_file = dl_manager.download(f'data/{self.config.corpus}/splits.txt')
+
+        with open(splits_file) as f:
+            split_names = [line.rstrip() for line in f]
+
         urls = {
             split: {
-                self.config.lang1: f"data/{self.config.corpus}/{split}/{self.config.lang1}.jsonl",
-                self.config.lang2: f"data/{self.config.corpus}/{split}/{self.config.lang2}.jsonl",
+                self.config.lang1: self.config.path_for(split, self.config.lang1),
+                self.config.lang2: self.config.path_for(split, self.config.lang2),
             }
-            for split in ['dev']
+            for split in split_names
         }
-        x = dl_manager.download_and_extract(urls)
-        print(x)
-
-        splits = [
-            (datasets.Split.TRAIN, 'train'),
-            (datasets.Split.VALIDATION, 'dev'),
-            (datasets.Split('test_2014'), 'test_2014'),
-            (datasets.Split('test_2019'), 'test_2019'),
-        ]
+        downloaded = dl_manager.download_and_extract(urls)
+
         return [
-            datasets.SplitGenerator(name=split, gen_kwargs=dict(
-                path_lang1=self.config.path_for(path, self.config.lang1),
-                path_lang2=self.config.path_for(path, self.config.lang2),
-            ))
-            for split, path in splits
+            datasets.SplitGenerator(name=split,
+                                    gen_kwargs=dict(
+                                        path_lang1=paths[self.config.lang1],
+                                        path_lang2=paths[self.config.lang2],
+                                    ))
+            for split, paths in downloaded.items()
         ]