update distil_cnndm.py

distil_cnndm.py

@@ -18,8 +18,11 @@ There are two features:
   - highlights: joined text of highlights with <s> and </s> around each
     highlight, which is the target summary
 
-The distilled data is obtained by running facebook/bart-large-cnn on the 
-training dataset. The files used here is directly downloaded from 
+The pseudo labels are generated by running 
+    1. facebook/bart-large-cnn on the CNN/DailyMail dataset, or
+    2. sshleifer/pegasus-cnn-ft-v2 on the CNN/DailyMail dataset.
+
+The files used here is directly downloaded from 
 https://github.com/huggingface/transformers/blob/main/examples/research_projects/seq2seq-distillation/precomputed_pseudo_labels.md.
 """
 
@@ -47,18 +50,18 @@ _SUPPORTED_VERSIONS = [
 _DEFAULT_VERSION = datasets.Version("2.0.0", "Using cased version.")
 
 
-class DistillCNNDMConfig(datasets.BuilderConfig):
-    """BuilderConfig for DistillCNNDM."""
+class DistilCNNDMConfig(datasets.BuilderConfig):
+    """BuilderConfig for DistilCNNDM."""
 
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
 
 
-class DistillCNNDM(datasets.GeneratorBasedBuilder):
+class DistilCNNDM(datasets.GeneratorBasedBuilder):
     """Distilled CNN/DailyMail non-anonymized summarization dataset."""
 
     BUILDER_CONFIGS = [
-        DistillCNNDMConfig(name=str(version), description="Plain text", version=version)
+        DistilCNNDMConfig(name=str(version), description="Plain text", version=version)
         for version in _SUPPORTED_VERSIONS
     ]
 
@@ -83,17 +86,21 @@ class DistillCNNDM(datasets.GeneratorBasedBuilder):
 
         Although dl_manager is not used, we still need to keep it.
         """
-        dl_paths = dl_manager.download(_DL_URLS)
         if self.config.version == "1.0.0":
+            extracted_path = dl_manager.download_and_extract(_DL_URLS["cnn_bart_pl"])
             return [
                 datasets.SplitGenerator(
                     name=split,
                     gen_kwargs={
                         "src_path": os.path.join(
-                            dl_paths["cnn_bart_pl"], f"{_SPLIT_MAP[split]}.source"
+                            extracted_path,
+                            "cnn_bart_pl",
+                            f"{_SPLIT_MAP[split]}.source",
                         ),
                         "tgt_path": os.path.join(
-                            dl_paths["cnn_bart_pl"], f"{_SPLIT_MAP[split]}.target"
+                            extracted_path,
+                            "cnn_bart_pl",
+                            f"{_SPLIT_MAP[split]}.target",
                         ),
                         "num_examples": _NUM_EXAMPLES[_SPLIT_MAP[split]],
                     },
@@ -105,15 +112,20 @@ class DistillCNNDM(datasets.GeneratorBasedBuilder):
                 ]
             ]
         elif self.config.version == "2.0.0":
+            extracted_path = dl_manager.download_and_extract(_DL_URLS["cnn_pegasus_pl"])
             return [
                 datasets.SplitGenerator(
                     name=datasets.Split.TRAIN,
                     gen_kwargs={
                         "src_path": os.path.join(
-                            dl_paths["cnn_pegasus_pl"], "train.source"
+                            extracted_path,
+                            "pegasus_cnn_cnn_pls",
+                            "train.source",
                         ),
                         "tgt_path": os.path.join(
-                            dl_paths["cnn_pegasus_pl"], "train.target"
+                            extracted_path,
+                            "pegasus_cnn_cnn_pls",
+                            "train.target",
                         ),
                         "num_examples": 287112,
                     },