【Python爬虫】入门级爬虫案例,20行代码爬取网站图片(附源码)
知识点
- 爬虫的步骤
- requests
- parsel
- xpath数据解析
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
目标网址:https://hdqwalls.com/
网站是静态数据,那么只要找到它的规律,以及url地址就行
import requests import parsel
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
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')
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----------------------')