Python——生成一个大文件ips.txt,要求1200行 ，每行随机为172.25.254.0/24段的ip（京东二面笔试题）

代码块：

from collections import Iterable
f = open('/tmp/passwd')
print(isinstance(f,Iterable))
for i,item in enumerate(f):
    if i == 10:
        break
    print(i,item)

示例及运行结果：

题目要求：
1. 生成一个大文件ips.txt,要求1200行
每行随机为172.25.254.0/24段的ip;
2. 读取ips.txt文件统计这个文件中ip出现频率排前10的ip;

代码块：

import random

def create_ip(filename):
    ip = ['172.25.254.' + str(i) for i in range(1,255)]
    with open(filename,'a+') as f:
        for i in range(1200):
            f.write(random.sample(ip,1)[0] + '\n')
create_ip('ips.txt')

def sorted_by_ip(filename,count=10):
    ips_dict = dict()
    with open(filename) as f:
        for ip in f:
            ip = ip.strip()
            if ip in ips_dict:
                ips_dict[ip] += 1
            else:
                ips_dict[ip] = 1
    sorted_ip = sorted(ips_dict.items(),key=lambda x:x[1],reverse=True)[:count]

    return sorted_ip

print(sorted_by_ip('ips.txt'))

示例及运行结果：