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