1#!/usr/bin/env python 2 3import random 4 5 6def main(argv, argc): 7 if argc == 0: 8 print 'Hello, world!' 9 print 'usage: hello.py [names]' 10 else: 11 print 'Hello, %s!' % random.choice(argv[1:]) 12 13 14if __name__ == '__main__': 15 import sys 16 main(sys.argv, len(sys.argv)) 17