Installing Ubuntu
I you don't have Ubuntu installed already, you may download it from ubuntu.com:
Installing Python and Spyder
Open up a terminal by clicking the launcher (the Ubuntu logo) in the upper left corner of the screen. Search for “Terminal” and click the icon that appears.
With the terminal open, type the following command to install all necessary packages:
sudo apt-get install ipython-notebook mayavi2 ipython python-pyside spyder
Afterwards, you will find Spyder in the Dash (the programs menu) by searching for "spyder":
You are done!