done

lib/python3.11/site-packages/narwhals/_sql/typing.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Any, TypeVar
+
+if TYPE_CHECKING:
+    from narwhals._sql.dataframe import SQLLazyFrame
+    from narwhals._sql.expr import SQLExpr
+
+    SQLExprAny = SQLExpr[Any, Any]
+    SQLLazyFrameAny = SQLLazyFrame[Any, Any, Any]
+
+SQLExprT = TypeVar("SQLExprT", bound="SQLExprAny")
+SQLExprT_contra = TypeVar("SQLExprT_contra", bound="SQLExprAny", contravariant=True)
+SQLLazyFrameT = TypeVar("SQLLazyFrameT", bound="SQLLazyFrameAny")