#!/usr/bin/env python 
#encoding=utf-8
import sys
def systest():
    first = sys.argv[1]
    print first
def judgeargv():
    total = len(sys.argv)
    if total != 2:
        print "参数个数不等于1 退出程序"
        sys.exit(0)
if __name__ == "__main__":
    judgeargv()
    systest()