Today I try to install a software - youdao dict. First I try it in vmware machine: Linuxmint and Ubuntu. It can succeed! But when I do it in Debian , it fails ; And the reason is the lost of python3-xlib. So I search in the web page of Debian: this package is not contained by Debian Jessie or Squeeze! The same to Ubuntu , it has. What happens about this package? mudongliang