win10下
pip install selenium时提示：
PermissionError: [WinError 5] 拒绝访问。: ‘c:\program files\python37\Lib\site-packages\urllib3‘
You are using pip version 9.0.1, however version 18.0 is available.
You should consider upgrading via the ‘python -m pip install --upgrade pip‘ command.
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两个问题：1. 拒绝访问 2. 更新问题
问题一解决方法：找到python37右键“属性“--安全--编辑--选择users--添加--勾选，点击应用
问题二解决方法：直接输入python -m pip install --upgrade pip安装
