python pip安装报错：ERROR: Could not install packages due to an EnvironmentError

macOS+pycharm+python3.7

今天豆瓣源安装了swifter

pip install -i https://pypi.douban.com/simple/ swifter

然后以下报错

ERROR: Could not install packages due to an EnvironmentError: [Errno 13] Permission denied: 'RECORD'

查询之后解决办法为，在pip之前添加sudo即可。

sudo pip install -i https://pypi.douban.com/simple/ swifter

原理不懂，但是这么做就安装成功了。