[YCM] youcompleteme unavailable: no module named "future"

[YCM] youcompleteme unavailable: no module named “future”

Error

youcompleteme 无法正常工作，进入vim 调试后发现报错：

vim
:YcmDebugInfo
youcompleteme unavailable: no module named "future"

Solution

安装future文件

sudo pip3 install future