python介绍小白可以学会XPath Helper用法

向右看齐 2023-06-13 06:16 10阅读 0赞

# 1、介绍小白可以学会的爬虫 #

## 1.1装chrome第三方库插件：XPath Helper ##

下载地址：https://chrome.google.com/webstore/detail/xpath-helper/hgimnogjllphhhkhlmebbmlgjoejdpjl  
使用链接地址：https://zhaoolee.com/ChromeAppHeroes/page/015\_xpath\_helper.html

1、被爬地址：https://cuiqingcai.com/category/technique/python  
2、操作办法  
第一步：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70]

第二步：调代码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 1]  
第三步：调出1条出来  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 2]  
第四步：调出多条出来  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 4]  
结果：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 5]

## 1.2贴代码 ##

***备注：（requests库和etree库提前安装，安装地址：https://blog.csdn.net/weixin\_41665637/article/details/99292935）***  
代码模板：

import requests
    from lxml import etree
    r=requests.get('https://cuiqingcai.com/category/technique/python').content
    topic=etree.HTML(r)
    title=topic.xpath('/html/body/section/div[2]/div/article/header/h2/a/text()')
    img=topic.xpath('/html/body/section/div[2]/div/article/div/a/img/@src')
    #
    # for x in html:
    # print(x,end="")
    
    for i in img:
        print(i)

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 6]

***备注：这个办法一般可以把新闻的除内容外的所有信息爬到***

## 怎么写 ##

右键去粘，但是如果数据还是显示有问题，则可以把内容补充全，补充的办法是给内容后加@【内容】  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 7]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20191114160502511.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MTY2NTYzNw==,size_16,color_FFFFFF,t_70
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