Python 不用selenium 带你高效爬取京东商品评论
2021-02-16 00:18
标签:https escape 时间 agent product gecko == 点赞 写入 代码实现 导入模块和定义常量 import re import time import csv import os import requests import html # 设置请求头 headers = { ‘cookie‘: ‘shshshfp=22dd633052035d21be92463ffa35684d; shshshfpa=ab283f84-c40f-9710-db89-84a8d3366a81-1586333030; __jda=122270672.1586333031101106032014.1586333031.1586333031.1586333031.1; __jdv=122270672|direct|-|none|-|1586333031103; __jdc=122270672; shshshfpb=bUe7tI9%2FOOaJKd7vP0EtSOg%3D%3D; __jdu=1586333031101106032014; areaId=22; ipLoc-djd=22-1977-1980-0; 3AB9D23F7A4B3C9B=7XEQD4BFTGEH44EK7LN7HLFCHJW6W2NS5VJOQOCHABZVI7LXJJIW3K2IX5MTPZ4TBERBLY6TRQR5CA3S3IYVLQ2JGI; jwotest_product=99; shshshsID=a7457cee6a4a9fa285fe2cff44c6bd17_4_1586333142454; __jdb=122270672.4.1586333031101106032014|1.1586333031; JSESSIONID=8C21549A613B83F0CB86EF1F38FD63D3.s1‘, ‘sec-fetch-dest‘: ‘document‘, ‘sec-fetch-mode‘: ‘navigate‘, ‘sec-fetch-site‘: ‘none‘, ‘sec-fetch-user‘: ‘?1‘, ‘upgrade-insecure-requests‘: ‘1‘, ‘User-Agent‘: ‘Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36‘ } 外汇返佣导入需要使用到的模块,并且定义请求头用于请求,减少被反爬的概率。 爬取评论主体函数 def comment_crawl(page, writer): ‘‘‘爬取评论‘‘‘ print(‘当前正在下载第%d页评论‘ % (page + 1)) url = ‘https://club.jd.com/comment/productPageComments.action?callback=fetchJSON_comment98&productId=100000499657&score=0&sortType=5&page=%d&pageSize=10&isShadowSku=0&fold=1‘ % page # 请求链接获取数据 text = requests.get(url, headers=headers).text # 正则表达式匹配数据 comment_list = re.findall( r‘guid":".*?"content":"(.*?)".*?"creationTime":"(.*?)",".*?"replyCount":(\d+),"score":(\d+).*?usefulVoteCount":(\d+).*?imageCount":(\d+).*?images":‘, text) for result in comment_list: # 根据正则表达式结果匹配数据 content = html.unescape(result[0]).replace(‘\n‘, ‘ ‘) comment_time = result[1] reply_count = result[2] score = result[3] vote_count = result[4] image_count = result[5] # 写入数据 writer.writerow((comment_time, score, reply_count, vote_count, image_count, content)) 这是爬取评论的主体部分,在请求获取到数据后,通过正则表达式匹配到所需内容。 这里有一个注意点,html.unescape(result[0])是为了将评论内容的HTML转义字符如…等转化成普通字符串,这样数据更完整清晰。 主函数 if __name__ == ‘__main__‘: ‘‘‘主函数‘‘‘ start = time.time() if os.path.exists(‘DATA.csv‘): os.remove(‘DATA.csv‘) with open(‘DATA.csv‘, ‘a+‘, newline=‘‘, encoding=‘gb18030‘) as f: writer = csv.writer(f) writer.writerow((‘留言时间‘, ‘评分‘, ‘回复数‘, ‘点赞数‘, ‘图片数‘, ‘评论内容‘)) for page in range(100): comment_crawl(page, writer) run_time = time.time() - start print(‘运行时间为%d分钟%d秒。‘ % (run_time // 60, run_time % 60)) 主函数创建文件用于保存数据,并对程序计时,以观察执行效率。 Python 不用selenium 带你高效爬取京东商品评论 标签:https escape 时间 agent product gecko == 点赞 写入 原文地址:https://www.cnblogs.com/benming/p/12711589.html
文章标题:Python 不用selenium 带你高效爬取京东商品评论
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