目录前言一、临时使用清华大学镜像源（推荐）二、永久配置清华大学镜像源配置文件路径配置步骤三、验证配置四、其他常用镜像源五、恢复默认源六、注意事项七、总结前言
So, say I have a string to parse with a given format that maps to a tree like data structure. The string is kinda similar to a folder path, and the structure is similar to a file structure, except its
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