How to crawl pictures with python
学完了爬网页中的文本,今天我们来试着学习爬图片。目标网址:http://www.netbian.com/
我们的目标就是爬取这些壁纸
打开网址 查看网页结构(推荐学习:Python视频教程)
用火狐浏览器打开链接 F12查看
由于我使用的pyquery
可以看到图片的链接 都在img标签的src属性中 我们只要通过pyquery锁定到这个img标签 就可以继续下一步了
我们先来尝试抓取一页的壁纸试试看
下面是具体的代码:
#!/usr/bin/env python # -*- coding: utf-8 -*- # @Time : 2018/10/31 17:54 # 爬取图片 import requests from pyquery import PyQuery as pq import time headers = { 'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 ' '(KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36' } # 这里我使用了代理 你可以去掉这个代理IP 我是为了后面大规模爬取做准备的 proxies = { 'https': '218.75.69.50:39590' } # 请求网页 获取源码 def start_request(url): r = requests.get(url, headers=headers, proxies=proxies) # 这个网站页面使用的是GBK编码 这里进行编码转换 r.encoding = 'GBK' html = r.text return html # 解析网页 获取图片 def parse(text): doc = pq(text) # 锁定页面中的img标签 images = doc('div.list ul li img').items() x = 0 for image in images: # 获取每一张图片的链接 img_url = image.attr('src') # 获得每张图片的二进制内容 img = requests.get(img_url, headers=headers, proxies=proxies).content # 定义要存储图片的路劲 path = "F:\\image\\" + str(x) + ".jpg" # 将图片写入指定的目录 写入文件用"wb" with open(path, 'wb') as f: f.write(img) time.sleep(1) print("正在下载第{}张图片".format(x)) x += 1 print("写入完成") def main(): url = "http://www.netbian.com" text = start_request(url) parse(text) if __name__ == "__main__": main()
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