python学习笔记-升级pip报错:Could not find a version that satisfies the requirement pip==19.1.1

说说pycharm中为我的python安装包的那些事:
发生背景:使用mac在pycharm中安装requests包,翻译器是我的虚拟环境python3.5.2。于是查找requests找到版本为2.22.0进行安装,结果报错Could not find a version that satisfies the requirement requests2.22.0 (from versions: )
No matching distribution found for requests
2.22.0
在终端执行也是一样
初步解决方法:升级pip版本。目前pip版本是7.1.0,最新版本19.1.1
先在pycharm上试升级python学习笔记-升级pip报错:Could not find a version that satisfies the requirement pip==19.1.1_第1张图片点击在19.1.1前面的箭头
结果提示失败
python学习笔记-升级pip报错:Could not find a version that satisfies the requirement pip==19.1.1_第2张图片Could not find a version that satisfies the requirement pip19.1.1 (from versi

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