【Python爬虫】入门级爬虫案例，20行代码爬取网站图片（附源码）

我就是我 2022-08-28 05:55 199阅读 0赞

# 知识点 #

*  爬虫的步骤
 *  requests
 *  parsel
 *  xpath数据解析

# 爬虫四个步骤: #

1.获取网页地址 (目标地址)  
2.发送请求  
3.数据解析  
4.保存 本地

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# 分析网站 #

目标网址：https://hdqwalls.com/  
![9db09671404179492e7fbd1144d91840.png][]

网站是静态数据，那么只要找到它的规律，以及url地址就行  
![0f6d6a13eae794a7b96e5d1330ea6b43.png][]

# [对于文章有疑问，或者想要Python相关资料的同学也可以点这里][Python] #

# 代码实现 #

### 导入模块 ###

import requests
    import parsel

### 请求数据 ###

url =f'https://hdqwalls.com/latest-wallpapers/page/1'
    # url = 'https://hdqwalls.com'
    # 请求头 伪装 爬虫:伪装成客户端向服务器发送数据请求
    headers = { 
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36'
    }
    
    requ = requests.get(url=url, headers=headers).text

### 数据解析 ###

sel = parsel.Selector(requ)  # <Selector xpath=None data='<html lang="en">\n<head>\n<script src="...'>
    pic_html = sel.xpath('//body/div/div[3]/div/a[1]/@href').getall()
    for html in pic_html:
        pic_html = 'https://hdqwalls.com' + html
        requ2 = requests.get(url=pic_html, headers=headers).text
        sel2 = parsel.Selector(requ2)
        title = sel2.xpath('//body/header/div/div/h1/text()').get().strip()
        href = sel2.xpath('//body/div/div[2]/div/div/div/a/@href').get()
        # 二进制请求
        requ3 = requests.get(url=href, headers=headers).content

### 保存数据 ###

with open('壁纸\\' + title + '.jpg', mode='wb')as fp:
        fp.write(requ3)
        print(title, '下载完成')

# 添加翻页后的完整代码 #

import requests
    import parsel
    
    
    for page in range(1,6):   # 包头不包尾
        url =f'https://hdqwalls.com/latest-wallpapers/page/{ page}'
        # url = 'https://hdqwalls.com'
        # 请求头 伪装 爬虫:伪装成客户端向服务器发送数据请求
        headers = { 
            'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36'
        }
    
        requ = requests.get(url=url, headers=headers).text  # <Response [200]> 数据请求成功
        sel = parsel.Selector(requ)  # <Selector xpath=None data='<html lang="en">\n<head>\n<script src="...'>
        pic_html = sel.xpath('//body/div/div[3]/div/a[1]/@href').getall()
        for html in pic_html:
            pic_html = 'https://hdqwalls.com' + html
            requ2 = requests.get(url=pic_html, headers=headers).text
            sel2 = parsel.Selector(requ2)
            title = sel2.xpath('//body/header/div/div/h1/text()').get().strip()
            href = sel2.xpath('//body/div/div[2]/div/div/div/a/@href').get()
            # 二进制请求
            requ3 = requests.get(url=href, headers=headers).content
            with open('壁纸\\' + title + '.jpg', mode='wb')as fp:
                fp.write(requ3)
                print(title, '下载完成')
        print(f'----------------------第{ page}页下载完成----------------------')

### 运行代码 ###

![485740d6dac0578e421020bf7df06508.png][]

![29a4243e069a94399c125b0bcf4c4a34.png][]

[Link 1]: https://www.bilibili.com/video/BV1544y1C7g4?share_source=copy_web
[9db09671404179492e7fbd1144d91840.png]: /images/20220828/3fa8c58b244f45b986864ebf0bf5e46f.png
[0f6d6a13eae794a7b96e5d1330ea6b43.png]: /images/20220828/9f25b957ac91485dbf93d2d10bc245c8.png
[Python]: https://link.csdn.net/?target=https%3A%2F%2Fjq.qq.com%2F%3F_wv%3D1027%26k%3DSuR89RD4
[485740d6dac0578e421020bf7df06508.png]: /images/20220828/4791dd7517b5431cacb08060da55eb5e.png
[29a4243e069a94399c125b0bcf4c4a34.png]: /images/20220828/4199e8e81b9748b9888d9755e412a949.png