pip安装三方库不成功,提示:You are using pip version 19.0.3, however version 21.3.1 is available. You should consider upgrading via the 'python -m pip install --upgrade pip' command.
原因:pip版本过低导致安装第三方库失败
解决方案:更新pip版本
1、cmd打开命令窗口
2、输入命令:easy_install -U pip(如下图)
3、检查一下新版本是否安装成功,输入命令:pip list
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