Support of pandas.Series (#378)

Co-authored-by: Auguste Baum <52001167+augustebaum@users.noreply.github.com>

src/skore/item/__init__.py

@@ -10,6 +10,7 @@
 from skore.item.media_item import MediaItem
 from skore.item.numpy_array_item import NumpyArrayItem
 from skore.item.pandas_dataframe_item import PandasDataFrameItem
+from skore.item.pandas_series_item import PandasSeriesItem
 from skore.item.primitive_item import PrimitiveItem
 from skore.item.sklearn_base_estimator_item import SklearnBaseEstimatorItem
 
@@ -19,6 +20,7 @@ def object_to_item(object: Any) -> Item:
     for cls in (
         PrimitiveItem,
         PandasDataFrameItem,
+        PandasSeriesItem,
         NumpyArrayItem,
         SklearnBaseEstimatorItem,
         MediaItem,
@@ -42,6 +44,7 @@ def object_to_item(object: Any) -> Item:
     "MediaItem",
     "NumpyArrayItem",
     "PandasDataFrameItem",
+    "PandasSeriesItem",
     "PrimitiveItem",
     "SklearnBaseEstimatorItem",
     "object_to_item",

src/skore/item/item_repository.py

@@ -16,6 +16,7 @@
 from skore.item.media_item import MediaItem
 from skore.item.numpy_array_item import NumpyArrayItem
 from skore.item.pandas_dataframe_item import PandasDataFrameItem
+from skore.item.pandas_series_item import PandasSeriesItem
 from skore.item.primitive_item import PrimitiveItem
 from skore.item.sklearn_base_estimator_item import SklearnBaseEstimatorItem
 
@@ -31,6 +32,7 @@ class ItemRepository:
         "MediaItem": MediaItem,
         "NumpyArrayItem": NumpyArrayItem,
         "PandasDataFrameItem": PandasDataFrameItem,
+        "PandasSeriesItem": PandasSeriesItem,
         "PrimitiveItem": PrimitiveItem,
         "SklearnBaseEstimatorItem": SklearnBaseEstimatorItem,
     }

src/skore/item/pandas_dataframe_item.py

@@ -47,14 +47,7 @@ def __init__(
 
     @cached_property
     def dataframe(self) -> pandas.DataFrame:
-        """
-        Convert the stored dictionary to a pandas DataFrame.
-
-        Returns
-        -------
-        pd.DataFrame
-            The pandas DataFrame representation of the stored dictionary.
-        """
+        """The pandas DataFrame."""
         import pandas
 
         return pandas.DataFrame.from_dict(self.dataframe_dict, orient="tight")
@@ -74,9 +67,9 @@ def factory(cls, dataframe: pandas.DataFrame) -> PandasDataFrameItem:
         PandasDataFrameItem
             A new PandasDataFrameItem instance.
         """
-        import pandas.core.frame
+        import pandas
 
-        if not isinstance(dataframe, pandas.core.frame.DataFrame):
+        if not isinstance(dataframe, pandas.DataFrame):
             raise TypeError(f"Type '{dataframe.__class__}' is not supported.")
 
         instance = cls(dataframe_dict=dataframe.to_dict(orient="tight"))

src/skore/item/pandas_series_item.py

@@ -0,0 +1,80 @@
+"""PandasSeriesItem.
+
+This module defines the PandasSeriesItem class,
+which represents a pandas Series item.
+"""
+
+from __future__ import annotations
+
+from functools import cached_property
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    import pandas
+
+from skore.item.item import Item
+
+
+class PandasSeriesItem(Item):
+    """
+    A class to represent a pandas Series item.
+
+    This class encapsulates a pandas Series along with its
+    creation and update timestamps.
+    """
+
+    def __init__(
+        self,
+        series_list: list,
+        created_at: str | None = None,
+        updated_at: str | None = None,
+    ):
+        """
+        Initialize a PandasSeriesItem.
+
+        Parameters
+        ----------
+        series_list : list
+            The list representation of the series.
+        created_at : str
+            The creation timestamp in ISO format.
+        updated_at : str
+            The last update timestamp in ISO format.
+        """
+        super().__init__(created_at, updated_at)
+
+        self.series_list = series_list
+
+    @cached_property
+    def series(self) -> pandas.Series:
+        """The pandas Series."""
+        import pandas
+
+        return pandas.Series(self.series_list)
+
+    @classmethod
+    def factory(cls, series: pandas.Series) -> PandasSeriesItem:
+        """
+        Create a new PandasSeriesItem instance from a pandas Series.
+
+        Parameters
+        ----------
+        series : pd.Series
+            The pandas Series to store.
+
+        Returns
+        -------
+        PandasSeriesItem
+            A new PandasSeriesItem instance.
+        """
+        import pandas
+
+        if not isinstance(series, pandas.Series):
+            raise TypeError(f"Type '{series.__class__}' is not supported.")
+
+        instance = cls(series_list=series.to_list())
+
+        # add series as cached property
+        instance.series = series
+
+        return instance

src/skore/project.py

@@ -11,6 +11,7 @@
     MediaItem,
     NumpyArrayItem,
     PandasDataFrameItem,
+    PandasSeriesItem,
     PrimitiveItem,
     SklearnBaseEstimatorItem,
     object_to_item,
@@ -120,6 +121,8 @@ def get(self, key: str) -> Any:
             return item.array
         elif isinstance(item, PandasDataFrameItem):
             return item.dataframe
+        elif isinstance(item, PandasSeriesItem):
+            return item.series
         elif isinstance(item, SklearnBaseEstimatorItem):
             return item.estimator
         elif isinstance(item, MediaItem):

src/skore/ui/report.py

@@ -12,6 +12,7 @@
 from skore.item.media_item import MediaItem
 from skore.item.numpy_array_item import NumpyArrayItem
 from skore.item.pandas_dataframe_item import PandasDataFrameItem
+from skore.item.pandas_series_item import PandasSeriesItem
 from skore.item.primitive_item import PrimitiveItem
 from skore.item.sklearn_base_estimator_item import SklearnBaseEstimatorItem
 from skore.project import Project
@@ -55,6 +56,9 @@ def __serialize_project(project: Project) -> SerializedProject:
         elif isinstance(item, PandasDataFrameItem):
             value = item.dataframe_dict
             media_type = "application/vnd.dataframe+json"
+        elif isinstance(item, PandasSeriesItem):
+            value = item.series_list
+            media_type = "text/markdown"
         elif isinstance(item, SklearnBaseEstimatorItem):
             value = item.estimator_html_repr
             media_type = "application/vnd.sklearn.estimator+html"

tests/unit/item/test_pandas_series_item.py

@@ -0,0 +1,36 @@
+import pytest
+from pandas import Series
+from pandas.testing import assert_series_equal
+from skore.item import PandasSeriesItem
+
+
+class TestPandasSeriesItem:
+    @pytest.fixture(autouse=True)
+    def monkeypatch_datetime(self, monkeypatch, MockDatetime):
+        monkeypatch.setattr("skore.item.item.datetime", MockDatetime)
+
+    @pytest.mark.order(0)
+    def test_factory(self, mock_nowstr):
+        series = Series([0, 1, 2])
+        series_list = series.to_list()
+
+        item = PandasSeriesItem.factory(series)
+
+        assert item.series_list == series_list
+        assert item.created_at == mock_nowstr
+        assert item.updated_at == mock_nowstr
+
+    @pytest.mark.order(1)
+    def test_series(self, mock_nowstr):
+        series = Series([0, 1, 2])
+        series_list = series.to_list()
+
+        item1 = PandasSeriesItem.factory(series)
+        item2 = PandasSeriesItem(
+            series_list=series_list,
+            created_at=mock_nowstr,
+            updated_at=mock_nowstr,
+        )
+
+        assert_series_equal(item1.series, series)
+        assert_series_equal(item2.series, series)

tests/unit/test_project.py

@@ -26,39 +26,45 @@ def project():
 
 
 def test_put_string_item(project):
-    project.put("string_item", "Hello, World!")  # JSONItem
+    project.put("string_item", "Hello, World!")
     assert project.get("string_item") == "Hello, World!"
 
 
 def test_put_int_item(project):
-    project.put("int_item", 42)  # JSONItem
+    project.put("int_item", 42)
     assert project.get("int_item") == 42
 
 
 def test_put_float_item(project):
-    project.put("float_item", 3.14)  # JSONItem
+    project.put("float_item", 3.14)
     assert project.get("float_item") == 3.14
 
 
 def test_put_bool_item(project):
-    project.put("bool_item", True)  # JSONItem
+    project.put("bool_item", True)
     assert project.get("bool_item") is True
 
 
 def test_put_list_item(project):
-    project.put("list_item", [1, 2, 3])  # JSONItem
+    project.put("list_item", [1, 2, 3])
     assert project.get("list_item") == [1, 2, 3]
 
 
 def test_put_dict_item(project):
-    project.put("dict_item", {"key": "value"})  # JSONItem
+    project.put("dict_item", {"key": "value"})
     assert project.get("dict_item") == {"key": "value"}
 
 
-def test_put_pandas_df(project):
-    df = pandas.DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
-    project.put("pandas_df", df)  # DataFrameItem
-    pandas.testing.assert_frame_equal(project.get("pandas_df"), df)
+def test_put_pandas_dataframe(project):
+    dataframe = pandas.DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
+    project.put("pandas_dataframe", dataframe)
+    pandas.testing.assert_frame_equal(project.get("pandas_dataframe"), dataframe)
+
+
+def test_put_pandas_series(project):
+    series = pandas.Series([0, 1, 2])
+    project.put("pandas_series", series)
+    pandas.testing.assert_series_equal(project.get("pandas_series"), series)
 
 
 def test_put_numpy_array(project):