华为机试题-识别有效的Ip地址和掩码并分类Python实现

#!/usr/bin/python
# -*- coding: utf-8 -*
import sys
A=0
B=0
C=0
D=0
E=0
error=0
privateIp=0
lastcode=[‘254‘,‘252‘,‘248‘,‘240‘,‘224‘,‘192‘,‘128‘,‘0‘]
def CheckIp(ip):
    if len(ip) !=4 or ‘‘ in ip:
        return False
    else:
        for i in range(4):
            if int(ip[i]) < 0 or int(ip[i]) > 255:
                return False
            else:
                return True
def CheckMask(mask):
    if len(mask)!=4:
        return False
    else:
        if mask[0]==‘255‘:
            if mask[1]==‘255‘:
                if mask[2]==‘255‘:
                    if mask[3] in lastcode:
                        return True
                    else:
                        return False
                elif mask[2] in lastcode and mask[3]==‘0‘:
                     return True
                else:
                     return False
            elif mask[1] in lastcode and mask[2]==mask[3]==‘0‘:
                return True
            else:
                return False
        elif mask[0] in lastcode and mask[1]==mask[2]==mask[3]==‘0‘:
            return True
        else:
            return False
while True:
    Input= sys.stdin.readline().strip()
    if Input == ‘‘:
        break
    ipList=Input.split(‘~‘)[0]
    maskList=Input.split(‘~‘)[1]
    ip=ipList.split(‘.‘)
    mask=maskList.split(‘.‘)
    if CheckIp(ip) and CheckMask(mask):
        if 1<=int(ip[0])<=126:
            A+=1
        if 128<=int(ip[0])<=191:
            B+=1
        if 192<=int(ip[0])<=223:
            C+=1
        if 224<=int(ip[0])<=239:
            D+=1
        if 240<=int(ip[0])<=255:
            E+=1
        if int(ip[0])==10 or (int(ip[0])==172 and 16<=int(ip[1])<=31) or (int(ip[0])==192 and int(ip[1])==168):
            privateIp+=1
    else:
        error+=1
    print(Input)
print(‘{} {} {} {} {} {} {}‘.format(A,B,C,D,E,privateIp,error))