imported annotations from __future__

Author: Ramy-Badr-Ahmed

data_structures/kd_tree/kd_node.py

@@ -1,3 +1,6 @@
+from __future__ import annotations
+
+
 class KDNode:
     """
     Represents a node in a KD-Tree.
@@ -11,8 +14,8 @@ class KDNode:
     def __init__(
         self,
         point: list[float],
-        left: "KDNode" | None = None,
-        right: "KDNode" | None = None,
+        left:  KDNode | None = None,
+        right: KDNode | None = None,
     ) -> None:
         """
         Initializes a KDNode with the given point and child nodes.