fix: correct VERSION type and stringify points

dataset.py

@@ -1,48 +1,43 @@
-VERSION = "0.0.2"
-import os, json
 from datasets import (
     GeneratorBasedBuilder, DatasetInfo, SplitGenerator, Split,
-    Features, Value, Sequence, Image
+    Features, Value, Sequence, Image, Version             # ← 多了 Version
 )
-from pathlib import Path   # ← 新增
-
+import os, json
 
 class TLPD(GeneratorBasedBuilder):
-    VERSION = "0.0.2"          # ← 只要改了版本，Hub 就會重建
+    VERSION = Version("0.0.3")   # ✔ 正確型別
 
     def _info(self):
         return DatasetInfo(
-            description="Taiwan License Plate Dataset",
+            description="Taiwan License Plate Dataset with LabelMe polygon annotations.",
             features=Features({
-                "image":  Image(),
-                "label":  Value("string"),
-                "points": Sequence(Sequence(Value("float32"))),
+                "image":   Image(),                     # 顯示在 Viewer
+                "label":   Value("string"),             # 顯示在 Viewer
+                # ↓➜ 轉成字串，Viewer 就能看；模型端再 json.loads() 還原即可
+                "points":  Value("string"),             
             }),
         )
 
     def _split_generators(self, dl_manager):
-        data_dir = Path(__file__).resolve().parent   # ★ 關鍵：改這行
-        return [
-            SplitGenerator(
-                name=Split.TRAIN,
-                gen_kwargs={
-                    "images_dir": data_dir / "images",
-                    "labels_dir": data_dir / "labels",
-                },
-            )
-        ]
+        root = dl_manager.manual_dir or dl_manager.download_and_extract({})
+        return [SplitGenerator(
+            name=Split.TRAIN,
+            gen_kwargs={
+                "images_dir": os.path.join(root, "images"),
+                "labels_dir": os.path.join(root, "labels"),
+            },
+        )]
 
     def _generate_examples(self, images_dir, labels_dir):
-        for file in sorted(os.listdir(labels_dir)):
-            if not file.endswith(".json"):
+        for fname in sorted(os.listdir(labels_dir)):
+            if not fname.endswith(".json"):
                 continue
-            with open(os.path.join(labels_dir, file), "r") as f:
+            with open(os.path.join(labels_dir, fname), "r") as f:
                 meta = json.load(f)
 
-            shape = meta["shapes"][0]
-            yield file[:-5], {
+            shape  = meta["shapes"][0]      # 只有一個 polygon
+            yield fname[:-5], {
                 "image":  os.path.join(images_dir, meta["imagePath"]),
-                "label":  shape["label"],
-                "points": shape["points"],
+                "label":  shape["label"],                       # "carplate"
+                "points": json.dumps(shape["points"]),          # <- 字串
             }
-