How to use install modules on linux ubuntu?

I use OS LUbuntu

I installed Python3.4 using the Lubuntu software center;

Next thing I want to do is to install some modules.Best way I can think of would be pip install. But I can't find it on the computer (I'm quite new to Linux).

Please help reaching the pip? or other way to install modules except pip?

I tried sudo apt-get install ... , but It installs it on python2.7 instead of python3.4 (I have 2 interpreters). Removing python2.7 off the computer is not an option..