hello piface

#! /usr/bin/python

import piface.pfio as pfio
from time import sleep

def clear_lights():
    pfio.digital_write(0,0)
    pfio.digital_write(1,0)
    pfio.digital_write(2,0)
    pfio.digital_write(3,0)
    pfio.digital_write(4,0)
    pfio.digital_write(5,0)
    pfio.digital_write(6,0)
    pfio.digital_write(7,0)
    return 0


def binary_pfio_lights(innum):
    while innum >= 256:
        innum = innum - 256

    binnum = bin(innum)
    binnum = binnum.split("b")
    binnum = str(binnum[1])

    while len(binnum) < 8:
        binnum = "0"+binnum

    # pin 7
    if binnum[0] == "1":
        pfio.digital_write(7,1)
    else:
        pfio.digital_write(7,0)

    # pin 6
    if binnum[1] == "1":
        pfio.digital_write(6,1)
    else:
        pfio.digital_write(6,0)

    # pin 5
    if binnum[2] == "1":
        pfio.digital_write(5,1)
    else:
        pfio.digital_write(5,0)

    # pin 4
    if binnum[3] == "1":
        pfio.digital_write(4,1)
    else:
        pfio.digital_write(4,0)

    # pin 3
    if binnum[4] == "1":
        pfio.digital_write(3,1)
    else:
        pfio.digital_write(3,0)

    # pin 2
    if binnum[5] == "1":
        pfio.digital_write(2,1)
    else:
        pfio.digital_write(2,0)

    # pin 1
    if binnum[6] == "1":
        pfio.digital_write(1,1)
    else:
        pfio.digital_write(1,0)

    # pin 0
    if binnum[7] == "1":
        pfio.digital_write(0,1)
    else:
        pfio.digital_write(0,0)

    return 0


if __name__ == '__main__':
    pfio.init()
    clear_lights()
    i = 0
    while (True):
        binary_pfio_lights(i)
        i = i + 1
        sleep(.25)