| 1 | # Example of delegating iteration to an internal container |
| 2 | |
| 3 | class Node: |
| 4 | def __init__(self, value): |
| 5 | self._value = value |
| 6 | self._children = [] |
| 7 | |
| 8 | def __repr__(self): |
| 9 | return 'Node({!r})'.format(self._value) |
| 10 | |
| 11 | def add_child(self, node): |
| 12 | self._children.append(node) |
| 13 | |
| 14 | def __iter__(self): |
| 15 | return iter(self._children) |
| 16 | |
| 17 | # Example |
| 18 | if __name__ == '__main__': |