Python简单定义与使用二叉树示例

class BinaryTree:
  def __init__(self,rootObj):
    self.root = rootObj
    self.leftChild = None
    self.rightChild = None
  def insertLeft(self,newNode):
    if self.leftChild == None:
      self.leftChild = BinaryTree(newNode)
    else:
      print('The leftChild is not None.You can not insert')
  def insertRight(self,newNode):
    if self.rightChild == None:
      self.rightChild = BinaryTree(newNode)
    else:
      print('The rightChild is not None.You can not insert')

r = BinaryTree('a')
print('root:',r.root,';','leftChild:',r.leftChild,';','rightChild:',r.rightChild)

r.insertLeft('b')
print('root:',r.root,';','leftChild:',r.leftChild,';','rightChild:',r.rightChild)
print('root:',r.root,';','leftChild.root:',r.leftChild.root,';','rightChild:',r.rightChild)

r.insertLeft('c')