安装pyqt5 时出现错误， 提示 could not fetch URL，最后检查发现原来是开了fiddler，关闭fiddler即可

![](https://cdn.jsdelivr.net/gh/kcyln/ImageHosting@latest/2020/07/28/228d472d3db177a3c03a2f058fdc7505.png)

解决方法链接：https://blog.csdn.net/jiang_xiaoo24/article/details/87689369

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