https://blog.youkuaiyun.com/jiangjiang_jian/article/details/79453856
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[s[i:i + x + 1] for x in range(len(s)) for i in range(len(s) - x)]
https://blog.youkuaiyun.com/jiangjiang_jian/article/details/79453856
转载于:https://www.cnblogs.com/alfredsun/p/9407055.html