if root.left is 0 and root.right is 0:
res += 1
return res
if root.left is not 0:
res += self.__count_leaf_node(root.left)
if root.right is not 0:
res += self.__count_leaf_node(root.right)
return res
def getbranchcount(self):
''' 获取二叉树分支节点数 '''
return self.__get_branch_node(self.root)
def __get_branch_node(self, root):
if root is 0:
return 0
if root.left is 0 and root.right is 0:
return 0
else:
return 1 + self.__get_branch_node(root.left) + self.__get_branch_node(root.right)
def replacelem(self):
''' 二叉树所有结点的左右子树相互交换 '''
self.__replace_element(self.root)
def __replace_element(self, root):
if root is 0:
return
root.left, root.right = root.right, root.left
self.__replace_element(root.left)
self.__replace_element(root.right)
node1 = TreeNode(data=1)
node2 = TreeNode(node1, 0, 2)
node3 = TreeNode(data=3)
node4 = TreeNode(data=4)
node5 = TreeNode(node3, node4, 5)
node6 = TreeNode(node2, node5, 6)
node7 = TreeNode(node6, 0, 7)
node8 = TreeNode(data=8)
root = TreeNode(node7, node8, 'root')
bt = BinaryTree(root)
print u'''
生成的二叉树
------------------------
root
7 8
6
2 5
1 3 4
-------------------------
'''
