''' 
生成ip写入文件 
''' 
import time 
 
time_start = time.time() 
#参数：number-生成条数；start-开始ip 
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(1000, '172.1.13.70') 
time_end = time.time() 
time = time_end - time_start 
print('耗时%s秒' % time)