python创建和遍历二叉树,可以使用递归的方式,源代码如下:
#!/usr/bin/python class node(): def __init__(self,k=None,l=None,r=None): self.key=k; self.left=l; self.right=r; def create(root): a=raw_input(‘enter a key:‘); if a is ‘#‘: root=None; else: root=node(k=a); root.left=create(root.left); root.right=create(root.right); return root; def preorder(root): #前序遍历 if root is None: return ; else : print root.key; preorder(root.left); preorder(root.right); def inorder(root): #中序遍历 if root is None: return ; else: inorder(root.left); print root.key; inorder(root.right); def postorder(root): # 后序遍历 if root is None: return ; else : postorder(root.left); postorder(root.right); print root.key; root=None; # 测试代码 root=create(root); preorder(root); inorder(root); postorder(root);运行程序,建立二叉树如图:
前序遍历结果为: a b c d e f
中序遍历结果为:c b d a f e
后序遍历结果为:c d b f e a
python中创建和遍历二叉树,布布扣,bubuko.com
原文地址:http://blog.csdn.net/u011608357/article/details/26075069