import os
from os.path import join

for root,dir,files in os.walk('/var/log'):
    # print(root)    
    # print(dir)       //输出目录
    # print(files)    //输出文件
    for name in files:  //遍历目录
        print(join(root,name))

# 京东二面笔试题
# 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;
"""

方法1:
import random

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

create_ip_file('ips.txt')

def sorted_by_ip(filename,count=10):
    ips_dict = dict()
    with open(filename) as f:
        for ip in f:
            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'))


方法2：
import random

f = open('/home/kiosk/Desktop/ips.txt', 'w+')
for i in range(1200):
    ip = '172.25.254.'
    num = random.randint(0, 255)
    f.write(ip + str(num) + '\n')
f.seek(0)
s = {}
for i in f.readlines():
    if i not in s:
        s[i] = 1
    else:
        s[i] += 1
list = list(s.items())
list1 = sorted(list, key=lambda x: x[1], reverse=True)
print(list1[0:10])
f.close()
# f.seek(0,0)
# print(f.read())