國內pip源提示「not a trusted or secure host」解決方案

你們應該都知道怎麼添加國內pip源（主要是豆瓣和阿里雲），~/.pip/pip.conf文件配置大概以下（下面註釋掉了豆瓣源）：

[global]
 # index-url = http://pypi.douban.com/simple
 index-url = http://mirrors.aliyun.com/pypi/simple/
 trusted-host = mirrors.aliyun.com

可是如今最新的pip要求源必須是https的，否則會報錯：

The repository located at http://mirrors.aliyun.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS it is recommended to use HTTPS instead, otherwise you may silence this warning and allow it anyways with '--trusted-host mirrors.aliyun.com'.

可是每次要加這麼長的尾巴很不geek，嘗試在上面pip.conf裏面加上

trusted-host = mirrors.aliyun.com

竟然好了，因此最終的pip.conf以下：

[global]
index-url = http://mirrors.aliyun.com/pypi/simple/
trusted-host = mirrors.aliyun.com

若是用豆瓣源，也是同理。