在网页上查看，测试使用，可以下载一个xpath helper
一级分类： //h3[@class="classify_c_h3"]/a/text()
二级分类： //div[@class="classify_list"]/span/a/text()
//div[contains(@class,"classify_list")]/span/a/text() #常用这种
#先下载一个lxml
import lxml.etree as le
with open('edu.html','r', encoding='utf_8') as f:
html = f.read()
html_x = le.HTML(html)
print(html_x)
#直接对HTML提取不需要加点
div_x_s = html_x.xpath('//div[@class="classify_cList"]')
print(div_x_s)
data_x =[]
for div_x in div_x_s:
#./代表早当前节点下进行搜索
catrgory1 = div_x.xpath('./h3/a/text()')[0]
catrgory2 = div_x.xpath('./div/span/a/text()')
data_x.append(
dict(
catrgory1=catrgory1,
catrgory2=catrgory2,
)
)
print(data_x)
for div in data_x:
print(div['catrgory1'])
for catrgory2 in div['catrgory2']:
print(' '+catrgory2)测试用的html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="referrer" content="always">
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outline: 0
}
.csdn-toolbar .btn {
min-width: auto;
}
a#adContent {
display: none !important
}
</style>
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<body class=" pc">
<script id="toolbar-tpl-scriptId" prod="download" skin="black"
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<input name="keywords" type="text" placeholder="搜索关键词" class="inp_srh"
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<script src="https://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>
<script>
var wx_share_img = "https://csdnimg.cn/release/edu/885b9be/resource/images/share_img.jpg";
var wx_share_title = "优快云学院-IT实战派";
var wx_share_options = {
title: wx_share_title,
desc: '优快云学院——专业的AI，区块链，Python前沿科技领域培训品牌。',
link: document.location.href,
imgUrl: wx_share_img
};
wx.config({
debug: false, //开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
appId: 'wxbf379f0cc12f8d15', // 必填，公众号的唯一标识
timestamp: 1564992755, // 必填，生成签名的时间戳
nonceStr: 'HmBqlr5bCrM8Yh3f', // 必填，生成签名的随机串
signature: 'f8ec6255b838e0961f55a70818b76a428f4f2e8a',// 必填，签名，见附录1
jsApiList: [
"onMenuShareTimeline", //分享到朋友圈
"onMenuShareAppMessage", //分享给好友
] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
});
wx.ready(function () {
// body开始位置插入微信分享图片
$("body").prepend('<span style="display:inline-block;width:0;height:0;overflow:hidden;position:absolute;top:-9999;"><img src="https://csdnimg.cn/release/edu/885b9be/resource/images/share_img.jpg" style="width:300px;height:300px;"/></span>');
// 获取“分享到朋友圈”按钮点击状态及自定义分享内容接口
// 文档地址：https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421141115
wx.onMenuShareTimeline(wx_share_options);
wx.onMenuShareAppMessage(wx_share_options);
});
</script>
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<div class="main main2019 clearfix">
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<div class="classify_list">
<span>
<a href="https://edu.youkuaiyun.com/courses/o5329_s5330">机器学习</a>
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<em> /</em>
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</span>
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href="https://edu.youkuaiyun.com/courses/o280">编程语言</a>
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<a href="https://edu.youkuaiyun.com/courses/o280_s281">C/C++</a>
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<em> /</em>
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<a href="https://edu.youkuaiyun.com/courses/o280_s348">Java</a>
</span>
<em> /</em>
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<a href="https://edu.youkuaiyun.com/courses/o280_s355">Python</a>
</span>
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<em> /</em>
<span>
<a href="https://edu.youkuaiyun.com/courses/o399_s403">思科认证</a>
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<em> /</em>
<span>
<a href="https://edu.youkuaiyun.com/courses/o399_s1373">软考</a>
</span>
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href="https://edu.youkuaiyun.com/courses/o230">移动开发</a>
</h3>
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<span>
<a href="https://edu.youkuaiyun.com/courses/o230_s287">iOS</a>
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<em> /</em>
<span>
<a href="https://edu.youkuaiyun.com/courses/o230_s329">微信开发</a>
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<em> /</em>
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<a href="https://edu.youkuaiyun.com/courses/o230_s330">Swift</a>
</span>
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href="https://edu.youkuaiyun.com/courses/o317">云计算/大数据</a>
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<em> /</em>
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</span>
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href="https://edu.youkuaiyun.com/courses/o-1">其他课程</a>
</h3>
<div class="classify_list">
<span>
<a href="https://edu.youkuaiyun.com/courses/o306">系统/网络/运维</a>
</span>
<em> /</em>
<span>
<a href="https://edu.youkuaiyun.com/courses/o319">数据库</a>
</span>
<em> /</em>
<span>
<a href="https://edu.youkuaiyun.com/courses/o7159">区块链</a>
</span>
</div>
</div>
</div>
<div class="allcat clearfix hide">
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<div id="showItem" class="showItem">
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</h4>
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class="showItem_cList01">深度学习</a>
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class="showItem_cList01">NLP</a>
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})();
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</body>
</html>
#直接测试
import urllib.request as ur
import lxml.etree as le
import user_agent
import json
def getRequest(url):
return ur.Request(
url=url,
headers={
'User-Agent':user_agent.get_user_agent_pc(),
}
)
request = ur.Request('https://edu.youkuaiyun.com/')
#先得到response
response = ur.urlopen(request).read()
html_x = le.HTML(response)
print(html_x)
# 直接对HTML提取不需要加点
div_x_s = html_x.xpath('//div[@class="classify_cList"]')
# print(div_x_s)
data_x = []
for div_x in div_x_s:
# ./代表早当前节点下进行搜索
catrgory1 = div_x.xpath('./h3/a/text()')[0]
catrgory2 = div_x.xpath('./div/span/a/text()')
data_x.append(
dict(
catrgory1=catrgory1,
catrgory2=catrgory2,
)
)
# print(data_x)
for div in data_x:
print(div['catrgory1'])
for catrgory2 in div['catrgory2']:
print(' ' + catrgory2)
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