behavior:expression((this.hideFocus=true) && (this.behavior='none'));

优化表达式与清除虚线框
本文介绍了一种优化表达式的写法,能够有效避免重复运算,提高代码效率。同时,文中还提供了非IE浏览器下清除元素虚线焦点框的CSS技巧。

这种写法可以避免expression多次运行,确实不错,学习了。

然后多加上一个非IE下的清除虚线框的css就是:

{ outline: none; }

import requests import re import time headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36'} def sousuo(company,page): url = 'https://news.so.com/ns?q='+ company + '&pn='+str(page)+'&rank=pdate&j=0&nso=20&tp=38&nc=0&src=page' res = requests.get(url, headers=headers, timeout=10).text p_source = '<cite class="sitename">(.*?)</cite>' source = re.findall(p_source, res, re.S) #print(source) p_date = '<span class="g-linkinfo-txt g-c-gray time">(.*?)</span>' date = re.findall(p_date, res, re.S) #print(date) p_title = '<div class="g-txt-inner g-ellipsis">(.*?)</div>' title = re.findall(p_title, res, re.S) # print(title) p_href = '<a hidefocus="true" href="(.*?)" target="_blank" rel="noopener" title=".*?">' href = re.findall(p_href, res) #print(href) for i in range(len(title)): title[i] = re.sub('<.*?>', '', title[i]) title[i] = re.sub('"', '"', title[i]) title[i] = re.sub(r'\s+', '', title[i]) print(str(i+1) + '.' + title[i] + '-' + date[i] + '-' + source[i]) print(href[i]) while True: companys = ['华为', '小米'] for company in companys: for i in range(2): # 这里一共爬取了2页 sousuo(company,i+1) print( '\n' + '“' + company + '”相关的新闻' + '第' + str(i+1) + '页' + '爬取成功') print('——————————————————————————————————————' + '\n'+ '\n') time.sleep(10) time.sleep(10) break 根据以上代码,简化并编程
最新发布
09-07
/Users/chenshiyu/PyCharmMiscProject/.venv/bin/python /Users/chenshiyu/PyCharmMiscProject/test.py <!DOCTYPE html> <!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/bdorz/baidu.min.css><title>百度一下,你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus=autofocus></span><span class="bg s_btn_wr"><input type=submit id=su value=百度一下 class="bg s_btn" autofocus></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新闻</a> <a href=https://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地图</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>视频</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>贴吧</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登录</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登录</a>'); </script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">更多产品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>关于百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>©2017 Baidu <a href=http://www.baidu.com/duty/>使用百度前必读</a>  <a href=http://jianyi.baidu.com/ class=cp-feedback>意见反馈</a> äº¬ICP证030173号  <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html> 进程已结束,退出代码为 0
05-14
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