fix(typing): Generic SparkLikeLazyFrame

Drops the `pyright` errors **24** -> **9**

Will close #2185

Author: dangotbanned

narwhals/_spark_like/dataframe.py

@@ -4,9 +4,11 @@
 from importlib import import_module
 from typing import TYPE_CHECKING
 from typing import Any
+from typing import Generic
 from typing import Iterator
 from typing import Literal
 from typing import Sequence
+from typing import TypeVar
 from typing import cast
 
 from narwhals._spark_like.utils import evaluate_exprs
@@ -41,16 +43,17 @@
     from narwhals.utils import Version
 
     SQLFrameDataFrame: TypeAlias = _SQLFrameDataFrame[Any, Any, Any, Any, Any]
-    _NativeDataFrame: TypeAlias = "DataFrame | SQLFrameDataFrame"
+    _NativeDataFrame: TypeAlias = "DataFrame | SQLFrameDataFrame"  # noqa: PYI047
 
+FrameT = TypeVar("FrameT", "DataFrame", "SQLFrameDataFrame")
 Incomplete: TypeAlias = Any  # pragma: no cover
 """Marker for working code that fails type checking."""
 
 
-class SparkLikeLazyFrame(CompliantLazyFrame):
+class SparkLikeLazyFrame(CompliantLazyFrame, Generic[FrameT]):
     def __init__(
         self: Self,
-        native_dataframe: _NativeDataFrame,
+        native_dataframe: FrameT,
         *,
         backend_version: tuple[int, ...],
         version: Version,
@@ -144,7 +147,7 @@ def _change_version(self: Self, version: Version) -> Self:
             implementation=self._implementation,
         )
 
-    def _from_native_frame(self: Self, df: DataFrame) -> Self:
+    def _from_native_frame(self: Self, df: FrameT) -> Self:
         return self.__class__(
             df,
             backend_version=self._backend_version,