done

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

@@ -0,0 +1,25 @@
+from __future__ import annotations  # pragma: no cover
+
+from typing import (
+    TYPE_CHECKING,  # pragma: no cover
+    Union,  # pragma: no cover
+)
+
+if TYPE_CHECKING:
+    import sys
+    from typing import Literal, TypeVar
+
+    if sys.version_info >= (3, 10):
+        from typing import TypeAlias
+    else:
+        from typing_extensions import TypeAlias
+
+    from narwhals._polars.dataframe import PolarsDataFrame, PolarsLazyFrame
+    from narwhals._polars.expr import PolarsExpr
+    from narwhals._polars.series import PolarsSeries
+
+    IntoPolarsExpr: TypeAlias = Union[PolarsExpr, PolarsSeries]
+    FrameT = TypeVar("FrameT", PolarsDataFrame, PolarsLazyFrame)
+    NativeAccessor: TypeAlias = Literal[
+        "arr", "cat", "dt", "list", "meta", "name", "str", "bin", "struct"
+    ]