Python爬取京东评论（多线程+队列+bs4+pymysql）

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1、概述

本博客纯属原创，如有转载，请注明作者
运行环境：python3.5

所需模块：bs4 ,queue.thread,pymysql,requests，大家如果想运行此代码，只需要将我标粗的部分修改即可。

2、具体内容

2、1导入具体模块

###导入具体模块
import requests
from  bs4 import BeautifulSoup
import re
from collections import deque
import sys
import numpy as np
import jieba
import threading
from threading import current_thread,Lock
from time import ctime ,sleep
import pymysql
import json
import urllib
import math
import queue

2、2定义线程类

class MyThread(threading.Thread):def __init__(self, funcs, args, name=''):threading.Thread.__init__(self)self.funcs = funcsself.name = nameself.args = argsdef run(self):self.funcs(*self.args)

2、3接下来就是重点了

###接下来就是爬取网页了
def getContent(que):while que:try:url = que.popleft()print('正在爬的线程是'+current_thread().name+"爬的是"+url)**headers** = {'Accept': 'text / html, application / xhtml + xml, image / jxr, * / *','Accept - Encoding': 'gzip, deflate','Accept - Language': 'zh - Hans - CN, zh - Hans;q = 0.5','User - Agent': 'Mozilla / 5.0(Windows NT 10.0; Win64;x64) AppleWebKit / 537.36(KHTML, like Gecko) Chrome/51.0.2704.79 Safari/ 537.36Edge/14.14393','Connection': 'Keep - Alive'}req = requests.get(url, headers=headers)req.encoding = 'gbk'res = req.textbs = BeautifulSoup(res)bs = bs.find_all('div', class_='i-item')total = []for i in bs:reg1 = i.find('dd')reg2 = i.find('span', class_=re.compile(r'^sta'))scores = reg2.get('class')scores = ''.join(scores)scores = str(scores)if scores == 'starsa5' or scores == 'starsa4' or scores == 'starsa3':j = 1##     j=1#if scores == 'starsa2' or scores == 'starsa1' or scores == 'starsa0':j = 0reg3 = re.compile("<[^>]*>")content = reg3.sub('', reg1.prettify())print(content)total.append((content, scores, j))**db = pymysql.connect('localhost', 'root', '**********', 'test')**db.encoding = 'utf-8'cursor = db.cursor()cursor.execute('set names utf8')sql = "INSERT INTO newjd (comment,scores ) VALUES ('%s','%s') "sql2 = "INSERT INTO test1 (title) VALUES ('%s') "cursor.execute(sql % (content, j))db.commit()cursor.close()db.close()sleep(3)except Exception:print('运行出错')

2、4运行

###在这里我用了四个线程
def main():que = deque()visited = set()id = [549056]####可自行选择商品idcommentpeypage = 30for i in id:itemsummaryurl = 'http://club.jd.com/ProductPageService.aspx?method=GetCommentSummaryBySkuId&referenceId=' + str(i)itemsummaryresponse = urllib.request.urlopen(itemsummaryurl)itemsummaryjson_dict = json.loads(itemsummaryresponse.read().decode('utf-8'))commentrange = int(math.ceil(itemsummaryjson_dict.get('CommentCount')) / commentpeypage)for j in range(commentrange):url = 'http://club.jd.com/review/' + str(i) + '-0-' + str(j) + '-0.html'que.append(url)thread=[]for i in range(4):t = MyThread(getContent, (que, ), name='thread' + str(i))thread.append(t)for i in range(4):thread[i].start()for i in range(4):thread[i].join()if __name__ =='__main__':main()