View source for SPI

=Pieken=
There will be spurious signals at n/2·crystal oscillator
frequency (n is an integer number). RF frequencies at
n/2·crystal oscillator frequency should therefore be
avoided (e.g. 2405, 2418, 2431, 2444, 2457, 2470 and
2483 MHz when using a 26 MHz crystal).

=verse install=
 sudo apt-get install python-dev build-essential
Finally, it is time to install the python SPI wrapper needed for python to access the port.
 mkdir python-spi
 cd python-spi
 wget https://raw.github.com/doceme/py-spidev/master/setup.py
 wget https://raw.github.com/doceme/py-spidev/master/spidev_module.c
 sudo python setup.py install