以下Python代码中，最符合标准二叉树节点构造规范的是？

第32259题单选题

class TreeNode:
    def __init__(self, val=0, left=None, right=None):
        self.val = val
        self.left = left
        self.right = right

class TreeNode:
    def init(self, val=0, left=None, right=None):
        self.val = val
        self.left = left
        self.right = right

class TreeNode:
    def __init__(val=0, left=None, right=None):
        val = val
        left = left
        right = right

class TreeNode:
    def __init__(self, val=0):
        self.val = val
        self.left = 0
        self.right = 0

程序运行统计

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知识点：

Python基础-二叉树节点构造

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答案解析