[skip ci] Add PickleItem

skore/src/skore/persistence/item/__init__.py

@@ -51,13 +51,9 @@ def item_to_object(item: Item) -> Any:
         return item.primitive
     elif isinstance(item, NumpyArrayItem):
         return item.array
-    elif isinstance(item, PandasDataFrameItem):
+    elif isinstance(item, PandasDataFrameItem) or isinstance(item, PolarsDataFrameItem):
         return item.dataframe
-    elif isinstance(item, PandasSeriesItem):
-        return item.series
-    elif isinstance(item, PolarsDataFrameItem):
-        return item.dataframe
-    elif isinstance(item, PolarsSeriesItem):
+    elif isinstance(item, PandasSeriesItem) or isinstance(item, PolarsSeriesItem):
         return item.series
     elif isinstance(item, SklearnBaseEstimatorItem):
         return item.estimator
@@ -66,7 +62,7 @@ def item_to_object(item: Item) -> Any:
     elif isinstance(item, MediaItem):
         return item.media_bytes
     elif isinstance(item, PickleItem):
-        return repr(item.pickle_bytes)
+        return repr(item.pickle)
     else:
         raise ValueError(f"Item {item} is not a known item type.")
 

skore/src/skore/persistence/item/pickle_item.py

@@ -0,0 +1,25 @@
+from functools import cached_property
+from pickle import dumps, loads
+from typing import Any
+
+from skore.item.item import Item
+
+
+class PickleItem(Item):
+    def __init__(
+        self,
+        pickle_bytes: bytes,
+        created_at: str | None = None,
+        updated_at: str | None = None,
+    ):
+        super().__init__(created_at, updated_at)
+
+        self.pickle_bytes = pickle_bytes
+
+    @cached_property
+    def pickle(self) -> Any:
+        return loads(self.pickle_bytes)
+
+    @classmethod
+    def factory(cls, object: Any) -> PickleItem:
+        return cls(dumps(object)