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pip安装line-profiler出错，最开始是读条的，但是下载到一半报错 ...

Using cached https://pypi.tuna.tsinghua.edu.cn/packages/14/fc/ecf4e238bb601ff829068e5a72cd1bd67b0ee0ae379db172eb6a0779c6b6/line_profiler-2.1.2.tar.gz Requirement ...