SRW for Python requires:
- Python 2.7 or 3.2 (64-bit or 32-bit)
- numpy
- matplotlib

On Debian like (using Python 2.7):
sudo apt-get install python python-numpy python-matplotlib

On Mac, install macports from http://www.macports.org/install.php then:
port install py27 py27-numpy py27-matplotlib

Remeber to use the installed python, which is not the default python of the system.

On Windows install python MS windows installer from http://www.python.org/getit/ 
and numpy and matplotlib from the binary files http://www.lfd.uci.edu/~gohlke/pythonlibs/
the latters are compiled correctly with Visual Studio 2008. 
Follow the instructions on the website to correctly install all the necessary dependencies.
The use of 64-bit versions is preferable.

