pip3
broken in Ubuntu 14.04.4 Trusty
$ lsb_release -dc
Description: Ubuntu 14.04.4 LTS
Codename: trusty
$ sudo aptitude install python3-pip -y
libpython3-dev{a} libpython3.4-dev{a} python3-colorama{a} python3-dev{a} python3-distlib{a} python3-html5lib{a} python3-pip python3-setuptools{a} python3-wheel{a} python3.4-dev{a}
$ sudo aptitude install python3-pip python3-setuptools