[root@yang python]# vi check_ip.py #!/usr/bin/python import os,sys def check_ip(ipaddr):         import sys         addr=ipaddr.strip().split('.')  #切割IP地址为一个列表         #print addr         if len(addr) != 4:  #切割后列表必须有4个参数                 print "check ip address failed!"                 sys.exit()         for i in range(4):                 try:                         addr[i]=int(addr[i])  #每个参数必须为数字，否则校验失败                 except:                         print "check ip address failed!"                         sys.exit()                 if addr[i]<=255 and addr[i]>=0:    #每个参数值必须在0-255之间                         pass                 else:                         print "check ip address failed!"                         sys.exit()                 i+=1         else:                 print "check ip address success!" if  len(sys.argv)!=2:  #传参加本身长度必须为2         print "Example: %s 10.0.0.1 "%sys.argv[0]         sys.exit() else:         check_ip(sys.argv[1])  #满足条件调用校验IP函数