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34 lines
744 B
Python
34 lines
744 B
Python
'''
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__author__ = "Ricardo Montañana Gómez"
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__copyright__ = "Copyright 2020, Ricardo Montañana Gómez"
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__license__ = "MIT"
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__version__ = "0.9"
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Inorder iterator for the binary tree of Snodes
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'''
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from trees.Snode import Snode
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class Siterator:
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"""Stree preorder iterator
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"""
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def __init__(self, tree: Snode):
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self._stack = []
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self._push(tree)
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def __iter__(self):
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return self
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def _push(self, node: Snode):
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if node is not None:
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self._stack.append(node)
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def __next__(self) -> Snode:
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if len(self._stack) == 0:
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raise StopIteration()
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node = self._stack.pop()
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self._push(node.get_up())
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self._push(node.get_down())
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return node
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