Example of how to use Python to determine the legitimacy of IP addresses

First, the use of methods and performance, see the Picture:

Second, Python implementation code:
Copy the Code code as follows:

[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, otherwise the checksum fails
Except
print "Check IP address failed!"
Sys.exit ()
If addr[i]<=255 and addr[i]>=0: between #每个参数值必须在0-255
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

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