【剑指offer】复杂链表的复制（python）

递归终止条件。if pHead is None: return

# -*- coding:utf-8 -*-
# class RandomListNode:
#     def __init__(self, x):
#         self.label = x
#         self.next = None
#         self.random = None
class Solution:
    # 返回 RandomListNode
    def Clone(self, pHead):
        # write code here
        if pHead is None:
            return None
        cloneHead = RandomListNode(pHead.label)
        cloneHead.random = pHead.random
        cloneHead.next = self.Clone(pHead.next)
        return cloneHead