Could not find a version that satisfies the requirement PIL
Python Imageing Library 简称 PIL Python常用的图像处理库之一 Pillow是PIL一个fork. 更换为: C:\Users\dangzh ...
原文：Could not find a version that satisfies the requirement flask
使用命令安装flask，出现报错 百度找到解决方法https: www.cnblogs.com lijinze tsinghua p .html 参考修改成pip install flask i http: pypi.douban.com simple trusted host pypi.douban.com就安装成功了。 原文： pip安装python包出错：Could not find a v ...
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