python 自动生成ip列表

#-*- coding:utf-8 -*-

#!/usr/bin/python

'''

Created on 2014-02-19

生成100万ip写入文件

@author: chenfei

'''

import time

time_start = time.time()

def get_ip(number='10' ,start='1.1.1.1' ): 

    file = open('ip_list.txt', 'w') 

    starts = start.split( '.')

    A = int(starts[0])

    B = int(starts[1])

    C = int(starts[2])

    D = int(starts[3])   

    for A in range(A,256):

        for B in range(B, 256):

            for C in range(C, 256):

                for D in range(D, 256):

                    ip = "%d.%d.%d.%d" %(A,B,C,D) 

                                       

                    if number > 1:                         

                        file.write(ip+ '\n')

                        number -= 1                      

                    elif number == 1:    #解决最后多一行回车问题

                        file.write(ip)

                        number -= 1

                    else:

                        file.close()

                        print ip

                        return                     

                D = 0

            C = 0

        B = 0   

get_ip(100000,'101.23.228.102')

time_end = time.time()

time = time_end - time_start

print '耗时%s秒' %time