update polars rust

Author: MarcoGorelli

polars_xdt/typing.py

@@ -0,0 +1,14 @@
+from typing import TYPE_CHECKING, Union
+
+if TYPE_CHECKING:
+    import sys
+    import polars as pl
+
+    if sys.version_info >= (3, 10):
+        from typing import TypeAlias
+    else:
+        from typing_extensions import TypeAlias
+    from polars.datatypes import DataType, DataTypeClass
+
+    IntoExpr: TypeAlias = Union[pl.Expr, str, pl.Series]
+    PolarsDataType: TypeAlias = Union[DataType, DataTypeClass]