done

lib/python3.11/site-packages/narwhals/_duckdb/series.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from narwhals._duckdb.utils import DeferredTimeZone, native_to_narwhals_dtype
+from narwhals.dependencies import get_duckdb
+
+if TYPE_CHECKING:
+    from types import ModuleType
+
+    import duckdb
+    from typing_extensions import Never, Self
+
+    from narwhals._utils import Version
+    from narwhals.dtypes import DType
+
+
+class DuckDBInterchangeSeries:
+    def __init__(self, df: duckdb.DuckDBPyRelation, version: Version) -> None:
+        self._native_series = df
+        self._version = version
+
+    def __narwhals_series__(self) -> Self:
+        return self
+
+    def __native_namespace__(self) -> ModuleType:
+        return get_duckdb()  # type: ignore[no-any-return]
+
+    @property
+    def dtype(self) -> DType:
+        return native_to_narwhals_dtype(
+            self._native_series.types[0],
+            self._version,
+            DeferredTimeZone(self._native_series),
+        )
+
+    def __getattr__(self, attr: str) -> Never:
+        msg = (  # pragma: no cover
+            f"Attribute {attr} is not supported for interchange-level dataframes.\n\n"
+            "If you would like to see this kind of object better supported in "
+            "Narwhals, please open a feature request "
+            "at https://github.com/narwhals-dev/narwhals/issues."
+        )
+        raise NotImplementedError(msg)  # pragma: no cover