望大佬帮忙 review 一下

爬取xx留言板代码

#coding=utf-8
import requests
import re
from bs4 import BeautifulSoup
import os
import threading
import Queue
import time
import urllib2
import string

f=open('d:\\nlx.txt','w')   #存储路径
NUM=10       #线程数
JOBS=2      #定义末页， 共有900多页，测试阶段设为2
q=Queue.Queue()
f.write(time.strftime('%H:%M:%S'))

def do_somthing(arg):
    #print arg
    pass

#lock=threading.Lock()
def working():
    global lock
    while True:
        arg=q.get(block=True,timeout=None)
        #do_somthing(arg)
        res=requests.get(arg)
        text=res.text
        soup=BeautifulSoup(text,'html.parser')   #解析网页源码
        f.write(time.strftime('%H:%M:%S'))       #写入线程时间
        f.write('_'*5 + soup.find('title').string[10:].encode('utf-8')+'_'*5+'\r\n')    #写入标题

        kk=soup.findAll('div',class_='viewbox')
        for st in kk:
            f.write(st.text.replace('\n',''))    #写入内容

        q.task_done()
        res.close()

root_url='http://www.nlx.gov.cn/inter/'
header={'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8',
    'Accept-Encoding':'gzip, deflate',
    'Accept-Language':'zh-CN,zh;q=0.9',
    'Cache-Control':'max-age=0',
    'Connection':'keep-alive',
    'Host':'www.nlx.gov.cn',
    'Upgrade-Insecure-Requests':'1',
    'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.62 Safari/537.36'}

#re_=re.compile('onclick="SwitchTheme.*?<a href="view\.php\?tid=(.*?)" target="_blank">',re.S)

for i in range(NUM):
    t=threading.Thread(target=working)
    t.setDaemon(True)
    t.start()

for i in range(1,JOBS):
    host_url='http://www.nlx.gov.cn/inter/?tid=&pages=%s'%i

    req=urllib2.Request(host_url)
    res=urllib2.urlopen(req)
    text=res.read()
    soup=BeautifulSoup(text,'html.parser')
    a=soup.find('dl',class_='lists')
    for aa in a.find_all('a'):
        q.put(root_url+aa['href'],True,None)   #传详细分页源址
    res.close()
q.join()
f.close()