Here are some pointers for maintaining a healthy Gentoo system.
0. Don't try to emerge anything without bringing your box up to date first.
emerge --sync && emerge -avuDt --changed-use --with-bdeps=y @world @system
1. Set your system python to 2.7.
eselect python list
eselect python set n
2. If in need for further assistance post your emerge --info
and use wgetpaste to provide relevant logs.