Improved cpl query

src/cpl_query/base/ordered_queryable.py

@@ -1,5 +1,4 @@
 from collections.abc import Callable
-from typing import Self
 
 from cpl_query.base.ordered_queryable_abc import OrderedQueryableABC
 from cpl_query.exceptions import ArgumentNoneException, ExceptionArgument
@@ -12,7 +11,7 @@ class OrderedQueryable(OrderedQueryableABC):
     def __init__(self, _t: type, _values: Iterable = None, _func: Callable = None):
         OrderedQueryableABC.__init__(self, _t, _values, _func)
 
-    def then_by(self, _func: Callable) -> Self:
+    def then_by(self, _func: Callable) -> OrderedQueryableABC:
         if self is None:
             raise ArgumentNoneException(ExceptionArgument.list)
 
@@ -23,7 +22,7 @@ class OrderedQueryable(OrderedQueryableABC):
 
         return OrderedQueryable(self.type, sorted(self, key=lambda *args: [f(*args) for f in self._funcs]), _func)
 
-    def then_by_descending(self, _func: Callable) -> Self:
+    def then_by_descending(self, _func: Callable) -> OrderedQueryableABC:
         if self is None:
             raise ArgumentNoneException(ExceptionArgument.list)