Update binary_search_tree.py

Author: lighting9999

data_structures/binary_tree/binary_search_tree.py

@@ -93,6 +93,7 @@
 
 from collections.abc import Iterable, Iterator
 from dataclasses import dataclass
+from pprint import pformat
 from typing import Any, Self
 
 
@@ -115,7 +116,7 @@ def __iter__(self) -> Iterator[int]:
         yield from self.right or []
 
     def __repr__(self) -> str:
-        from pprint import pformat
+
 
         if self.left is None and self.right is None:
             return str(self.value)