Fix no dev set case

multilexnorm.py

@@ -133,39 +133,65 @@ class MultiLexNorm(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
-        _URLS = {
-            "train": os.path.join(_DATA_DIR, self.config.name, "train.norm"),
-            "dev": os.path.join(_DATA_DIR, self.config.name, "dev.norm"),
-            "test": os.path.join(_DATA_DIR, self.config.name, "test.norm"),
-        }
-        downloaded_files = dl_manager.download_and_extract(_URLS)
-
-        return [
-            datasets.SplitGenerator(
-                name=datasets.Split.TRAIN,
-                # These kwargs will be passed to _generate_examples
-                gen_kwargs={
-                    "filepath": downloaded_files["train"],
-                    "split": "train",
-                },
-            ),
-            datasets.SplitGenerator(
-                name=datasets.Split.VALIDATION,
-                # These kwargs will be passed to _generate_examples
-                gen_kwargs={
-                    "filepath": downloaded_files["dev"],
-                    "split": "dev",
-                },
-            ),
-            datasets.SplitGenerator(
-                name=datasets.Split.TEST,
-                # These kwargs will be passed to _generate_examples
-                gen_kwargs={
-                    "filepath": downloaded_files["test"],
-                    "split": "test",
-                },
-            ),
-        ]
+        try:
+            _URLS = {
+                "train": os.path.join(_DATA_DIR, self.config.name, "train.norm"),
+                "dev": os.path.join(_DATA_DIR, self.config.name, "dev.norm"),
+                "test": os.path.join(_DATA_DIR, self.config.name, "test.norm"),
+            }
+            downloaded_files = dl_manager.download_and_extract(_URLS)
+
+            return [
+                datasets.SplitGenerator(
+                    name=datasets.Split.TRAIN,
+                    # These kwargs will be passed to _generate_examples
+                    gen_kwargs={
+                        "filepath": downloaded_files["train"],
+                        "split": "train",
+                    },
+                ),
+                datasets.SplitGenerator(
+                    name=datasets.Split.VALIDATION,
+                    # These kwargs will be passed to _generate_examples
+                    gen_kwargs={
+                        "filepath": downloaded_files["dev"],
+                        "split": "dev",
+                    },
+                ),
+                datasets.SplitGenerator(
+                    name=datasets.Split.TEST,
+                    # These kwargs will be passed to _generate_examples
+                    gen_kwargs={
+                        "filepath": downloaded_files["test"],
+                        "split": "test",
+                    },
+                ),
+            ]
+        except FileNotFoundError:
+            _URLS = {
+                "train": os.path.join(_DATA_DIR, self.config.name, "train.norm"),
+                "test": os.path.join(_DATA_DIR, self.config.name, "test.norm"),
+            }
+            downloaded_files = dl_manager.download_and_extract(_URLS)
+
+            return [
+                datasets.SplitGenerator(
+                    name=datasets.Split.TRAIN,
+                    # These kwargs will be passed to _generate_examples
+                    gen_kwargs={
+                        "filepath": downloaded_files["train"],
+                        "split": "train",
+                    },
+                ),
+                datasets.SplitGenerator(
+                    name=datasets.Split.TEST,
+                    # These kwargs will be passed to _generate_examples
+                    gen_kwargs={
+                        "filepath": downloaded_files["test"],
+                        "split": "test",
+                    },
+                ),
+            ]
 
     # method parameters are unpacked from `gen_kwargs` as given in `_split_generators`
     def _generate_examples(self, filepath, split):