WS2801S control via /dev/spidev -- now at https://github.com/azrdev/WS2801S-MQTT

LEDStrip2.py

#! /usr/bin/env python3
import math
import array
import fcntl

spidev = open("/dev/spidev0.0", "wb")
fcntl.ioctl(spidev, 0x40046b04, array.array('L', [400000]))

class LEDStrip:
    def __init__(self, size):
        self.size = size
        self.strip = []
        empty = {"r": 0,
                 "g": 0,
                 "b": 0}
        for i in range(size):
            self.strip.append(empty)

    def setColor(self, led, color):
        self.strip[led] = color

    def getColor(self, led):
        return self.strip[led]

    def update(self):
        for i in range(self.size):
            foo = self.strip[i]
            rgb = bytearray(3)
            rgb[0] = foo["g"]
            rgb[1] = foo["r"]
            rgb[2] = foo["b"]
            spidev.write(rgb)

        spidev.flush()

light2.py

#! /usr/bin/env python3
from LEDStrip2 import LEDStrip
import random
import time
LENGTH = 64
MAX = 120

strip = LEDStrip(LENGTH)

i=0
while True:
  r = random.randrange(0,2) * MAX
  g = random.randrange(0,2) * MAX
  b = random.randrange(0,2) * MAX
  for i in range(0,LENGTH-1):
    color = {"r": r,
             "g": g,
             "b": b}

    #i+=1 # = random.randrange(0,LENGTH)
    strip.setColor(i,color)

    print("Set LED {} to {},{},{}".format(i,r,g,b))
  time.sleep(0.01)
  strip.update()

now at https://github.com/azrdev/WS2801S-MQTT