move from tyiping.Self to type_extensions.Self for py310

Author: evertlammerts

duckdb/experimental/spark/_globals.py

@@ -33,7 +33,7 @@ def foo(arg=pyducdkb.spark._NoValue):
 
 __ALL__ = ["_NoValue"]
 
-from typing import Self
+from typing_extensions import Self
 
 # Disallow reloading this module so as to preserve the identities of the
 # classes defined here.

duckdb/experimental/spark/sql/types.py

@@ -9,16 +9,9 @@
 from builtins import tuple
 from collections.abc import Iterator, Mapping
 from types import MappingProxyType
-from typing import (
-    Any,
-    ClassVar,
-    NoReturn,
-    Self,
-    TypeVar,
-    Union,
-    cast,
-    overload,
-)
+from typing import Any, ClassVar, NoReturn, TypeVar, Union, cast, overload
+
+from typing_extensions import Self
 
 import duckdb
 from duckdb.sqltypes import DuckDBPyType