Created by Alex Li; Bell us when it's the whole point

TheBigBen.py

# coding=gbk
import time
from datetime import datetime

LAST_MINUTE = 59 #when it is the last mintue in an hour,the minute is (60-1)
MINUTE_SECONDS = 60#one minute has 60s

def main():    
    '''This is a main function to print bell when time is the whole point.'''
    
    if time.localtime().tm_min == LAST_MINUTE:
        # when the minute is 59, the sleep time is not 60s any more
        time.sleep(MINUTE_SECONDS-time.localtime().tm_sec)
        print "dang!"*int(datetime.now().strftime("%I")) + '\n'
    else:
        time.sleep(MINUTE_SECONDS)
                
while 1:
    if __name__ == '__main__':
        main()