lcd_tut.py

#!/usr/bin/env python
import LCD1602
import time
from datetime import datetime

def setup():
    LCD1602.init(0x27, 1)   # init(slave address, background light)
    i = datetime.now()
    start = datetime(2015, 3, 25)
    delta = i - start
    weeks = (delta.days)/7
    #x = int(weeks)  
    LCD1602.write(0, 0, "weeks")
    #LCD1602.write(1, 1, 'from SunFounder')
    time.sleep(2)

def loop():
    LCD1602.init(0x27, 1)   # init(slave address, background light)
    space = '                '
    greetings = 'Thank you for buying SunFounder Sensor Kit for Raspberry! ^_^'
    greetings = space + greetings
    while True:
        tmp = greetings
        for i in range(0, len(greetings)):
            LCD1602.write(0, 0, tmp)
            tmp = tmp[1:]
            time.sleep(0.8)
            LCD1602.clear()

def destroy():
    pass    

if __name__ == "__main__":
    try:
        setup()
        while True:
            pass
    except KeyboardInterrupt:
        destroy()