廖雪峰的官方网站 python 基础:https://www.liaoxuefeng.com/wiki/1016959663602400/1017075323632896
GeeksforGeeks—python: https://www.geeksforgeeks.org/python-programming-language/
GeeksforGeeks—Article: https://www.geeksforgeeks.org/
GeeksforGeeks—TCS Placement Paper: https://www.geeksforgeeks.org/placements-gq/#TRP
LeetCode-cn:https://leetcode-cn.com/explore/