(tree, value)
| 239 | |
| 240 | print("Example 17") |
| 241 | def contains_class(tree, value): |
| 242 | if not isinstance(tree, Node): |
| 243 | return tree == value |
| 244 | elif value < tree.value: |
| 245 | return contains_class(tree.left, value) |
| 246 | elif value > tree.value: |
| 247 | return contains_class(tree.right, value) |
| 248 | else: |
| 249 | return tree.value == value |
| 250 | |
| 251 | |
| 252 | assert contains_class(obj_tree, 9) |