(self, data: Any)
| 287 | self.root = insert_node(self.root, data) |
| 288 | |
| 289 | def del_node(self, data: Any) -> None: |
| 290 | print("delete:" + str(data)) |
| 291 | if self.root is None: |
| 292 | print("Tree is empty!") |
| 293 | return |
| 294 | self.root = del_node(self.root, data) |
| 295 | |
| 296 | def __str__( |
| 297 | self, |