7-13爬虫入门之BeautifulSoup对网页爬取内容的解析

通过beautifulsoup对json爬取的文件进行元素审查，获取是否含有p标签

# -*- coding:utf-8 -*-
from lxml import html
import requests
import json
import re
import scrapy
from bs4 import BeautifulSoup

#通过beautifulsoup解析文档
def bs4analysis(html_doc):
    soup = BeautifulSoup(html_doc,"lxml")
    if soup.find_all(‘a‘):
        print soup.a.string
        print soup.a.nextSibling
    elif html_doc.find(‘#‘)>=0:
        print ‘有主题‘
        p=re.split(‘#‘,html_doc)
        print ‘p0‘+p[0]
        print ‘p1‘+p[1]
        print ‘p2‘+p[2]
    else:
        print ‘haha‘

html_doc=‘‘‘
<a class=‘k‘ href=‘https://m.weibo.cn/k/SHU毕业季?from=feed‘>#毕业季#</a>  云端祝福！祝全体2017届毕业生及全球人前程似锦。 <a data-url="http://t.cn/RootR20" href="https://m.weibo.cn/p/index?containerid=230444def4f80e7a017ab35b3e37cadc001f32&url_type=39&object_type=video&pos=1&luicode=10000011&lfid=1076033243026514&featurecode=20000320&ep=F9u8aqkyn%2C3243026514%2CF9u8aqkyn%2C3243026514" data-hide=""><span class="url-icon"><img src="https://h5.sinaimg.cn/upload/2015/09/25/3/timeline_card_small_video_default.png"></span></i><span class="surl-text">秒拍视频</a>
‘‘‘
html_doc2=‘‘‘
#早安# 万木沉酣新雨后，百昌苏醒晓风前，四时可爱唯春色，一事能狂便少年。——王国维
‘‘‘

html_doc3=‘‘‘
<a class=‘k‘ href=‘https://m.weibo.cn/k/通知公告?from=feed‘>#通知公告#</a>南区浴室男生区因突发水管爆裂，今日起将关闭2间浴室，请各位提早安排应对。
‘‘‘
html_doc4=‘‘‘
我发表了头条文章:《共建美术学院签约暨上海吴淞国际艺术城发展研究院揭牌仪式举行》 <a data-url=""http://t.cn/RK2rQFs"" href=""http://media.weibo.cn/article?object_id=1022%3A2309404126988389488631&url_type=39&object_type=article&pos=1&luicode=10000011&lfid=1076033243026514&id=2309404126988389488631&ep=Fbk5FbYMp%2C3243026514%2CFbk5FbYMp%2C3243026514"" data-hide=""""><span class=""url-icon""><img src=""https://h5.sinaimg.cn/upload/2015/09/25/3/timeline_card_small_article_default.png""></span></i><span class=""surl-text"">共建美术学院签约暨上海吴淞国际艺术城发展研究院揭牌仪式举行</a> ???
‘‘‘
html_doc5=‘‘‘
<a class=‘k‘ href=‘https://m.weibo.cn/k/SHU分享?from=feed‘>#分享#</a> 斗转星移，岁月如梭<span class=""url-icon""><img src=""//h5.sinaimg.cn/m/emoticon/icon/others/l_xin-8e9a1a0346.png"" style=""width:1em;height:1em;"" [心]""></span>
‘‘‘
if __name__ == ‘__main__‘:
    f = open(‘shuweibo.txt‘, ‘r‘)
    fh = open(‘analysis.txt‘, ‘a‘)
    while True:
        line = f.readline()
        if line == ‘‘:
            break
        print ‘*******************‘
        bs4analysis(line)
        print ‘*******************‘

    f.close()
    fh.close()