Python TreeNode如何实现树的二叉搜索树

要实现一个树的二叉搜索树，需要定义一个TreeNode类，并实现插入、查找、删除等操作。下面是一个示例代码实现：

class TreeNode:
    def __init__(self, key):
        self.val = key
        self.left = None
        self.right = None
    
    def insert(self, key):
        if self.val is None:
            self.val = key
        else:
            if key < self.val:
                if self.left is None:
                    self.left = TreeNode(key)
                else:
                    self.left.insert(key)
            else:
                if self.right is None:
                    self.right = TreeNode(key)
                else:
                    self.right.insert(key)
    
    def find(self, key):
        if key == self.val:
            return True
        elif key < self.val:
            if self.left is None:
                return False
            else:
                return self.left.find(key)
        else:
            if self.right is None:
                return False
            else:
                return self.right.find(key)
    
    def delete(self, key):
        if key < self.val:
            if self.left:
                self.left = self.left.delete(key)
        elif key > self.val:
            if self.right:
                self.right = self.right.delete(key)
        else:
            if self.left is None:
                return self.right
            elif self.right is None:
                return self.left
            temp = self.right
            min_val = temp.val
            while temp.left:
                temp = temp.left
                min_val = temp.val
            self.val = min_val
            self.right = self.right.delete(min_val)
        return self
    
    def inorder_traversal(self):
        result = []
        if self:
            result += self.left.inorder_traversal() if self.left else []
            result.append(self.val)
            result += self.right.inorder_traversal() if self.right else []
        return result

# 示例代码
root = TreeNode(6)
root.insert(3)
root.insert(9)
root.insert(1)
root.insert(5)
root.insert(7)
root.insert(11)

print(root.find(5))  # True
print(root.find(8))  # False

root.delete(3)

print(root.inorder_traversal())  # [1, 5, 6, 7, 9, 11]

在上面的示例代码中，我们定义了一个TreeNode类，包括插入、查找、删除和中序遍历等方法。通过这些方法，我们可以实现一个二叉搜索树，并进行相关操作。