fix: Fix encoding and refactor nkjp-pos.py file

nkjp-pos.py

@@ -31,41 +31,41 @@ _URLS = {
 _HOMEPAGE = "http://clip.ipipan.waw.pl/NationalCorpusOfPolish"
 
 _POS_TAGS = {
-    'adj',
-    'adja',
-    'adjc',
-    'adjp',
-    'adv',
-    'aglt',
-    'bedzie',
-    'brev',
-    'burk',
-    'comp',
-    'conj',
-    'depr',
-    'fin',
-    'ger',
-    'imps',
-    'impt',
-    'inf',
-    'interj',
-    'interp',
-    'num',
-    'numcol',
-    'pact',
-    'pant',
-    'pcon',
-    'ppas',
-    'ppron12',
-    'ppron3',
-    'praet',
-    'pred',
-    'prep',
-    'qub',
-    'siebie',
-    'subst',
-    'winien',
-    'xxx'
+    "adj",
+    "adja",
+    "adjc",
+    "adjp",
+    "adv",
+    "aglt",
+    "bedzie",
+    "brev",
+    "burk",
+    "comp",
+    "conj",
+    "depr",
+    "fin",
+    "ger",
+    "imps",
+    "impt",
+    "inf",
+    "interj",
+    "interp",
+    "num",
+    "numcol",
+    "pact",
+    "pant",
+    "pcon",
+    "ppas",
+    "ppron12",
+    "ppron3",
+    "praet",
+    "pred",
+    "prep",
+    "qub",
+    "siebie",
+    "subst",
+    "winien",
+    "xxx",
 }
 
 
@@ -79,10 +79,11 @@ class NKJPPOS(datasets.GeneratorBasedBuilder):
                 {
                     "id": datasets.Value("string"),
                     "tokens": datasets.Sequence(datasets.Value("string")),
-                    "pos_tags": datasets.Sequence(datasets.features.ClassLabel(
-                        names=list(_POS_TAGS),
-                        num_classes=len(_POS_TAGS)
-                    )),
+                    "pos_tags": datasets.Sequence(
+                        datasets.features.ClassLabel(
+                            names=list(_POS_TAGS), num_classes=len(_POS_TAGS)
+                        )
+                    ),
                 }
             ),
             homepage=_HOMEPAGE,
@@ -90,7 +91,7 @@ class NKJPPOS(datasets.GeneratorBasedBuilder):
         )
 
     def _split_generators(
-            self, dl_manager: datasets.DownloadManager
+        self, dl_manager: datasets.DownloadManager
     ) -> List[datasets.SplitGenerator]:
         urls_to_download = _URLS
         downloaded_files = dl_manager.download_and_extract(urls_to_download)
@@ -119,9 +120,9 @@ class NKJPPOS(datasets.GeneratorBasedBuilder):
         return data_line
 
     def _generate_examples(
-            self, filepath: str
+        self, filepath: str
     ) -> Generator[Tuple[str, Dict[str, str]], None, None]:
-        with open(filepath, 'r') as f:
+        with open(filepath, "r", encoding="utf-8") as f:
             for line in f:
                 data_line = self._clean_line(json.loads(line))
                 yield data_line["id"], data_line