Install virtualenv with virtualenvwrapper for python3.4 and django1.7 on Linux(ubuntu).

Virtual Environment(virtualenv) make easy to manage various environment for development.
It can create environment for each different version of python.

Install virtualenv.

$ sudo pip install virtualenv

Install virtualenvwrapper for easy control.

$ pip install virtualenvwrapper

Make virtualenv home directory.

$ mkdir ~/.virtualenvs

Setup for shell.

Write directory for work in ~/.bashrc

export WORKON_HOME=$HOME/.virtualenvs   
export PROJECT_HOME=$HOME/[YOUR_WORKSPACE]

For execute virtualenvwrapper. (in ~/.bashrc)

source /usr/local/bin/virtualenvwrapper.sh

Apply.

$ source ~/.bashrc

Check.

$ echo $WORKON_HOME

Make virtualenv for python3. (Assume python3.4 was installed.)

$ mkvirtualenv --python=/usr/bin/python3 [ENV_NAME]

It will make virtualenv in your WORKON_HOME directory.
Check.

$ echo $WORKON_HOME

$ ls $WORKON_HOME

$ workon

Check your python version.

$ python --version

Install django on your virtual env (1.7)

Go into your virtual env.

$ workon [ENV_NAME]

Install django.

$ pip install django

Basic command for management.

Check your virtualenv projects.

workon

Go into virtualenv.

workon [ENV_NAME]

Deactivate from virtualenv.

deactivate