爬虫入门-4-2.爬取豆瓣读书图片

一.利用lxml解析

from lxml import etree
import os
import requests

PROXY = {
    ‘HTTPS‘: ‘116.209.55.208:9999‘
}

def spider():
    url = ‘https://book.douban.com/latest?icn=index-latestbook-all‘
    response = requests.get(url, proxies=PROXY)
    html = etree.HTML(response.content)
    # imgs是list类型
    imgs = html.xpath("//div[@class=‘article‘]//ul/li/a/img/@src")
    save_pic(imgs)

def save_pic(images):
    j = 0
    if os.path.exists(‘pi‘):
        pass
    else:
        os.mkdir(‘pi‘)
    for img in images:
        j = j + 1
        with open(‘pi/‘ + str(j) + ‘.jpg‘, ‘wb‘) as fd:
            picture = requests.get(img).content
            fd.write(picture)

if __name__ == ‘__main__‘:
    spider()

二.利用beautifulSoup解析:

 1 import os
 2
 3 import requests
 4 from bs4 import BeautifulSoup
 5
 6 PROXY = {
 7     ‘HTTPS‘: ‘116.209.55.208:9999‘
 8 }
 9
10
11 def spider():
12     url = ‘https://book.douban.com/latest?icn=index-latestbook-all‘
13     response = requests.get(url, proxies=PROXY)
14     soup = BeautifulSoup(response.content, ‘lxml‘)
15     # class为cover的所有a标签
16     a_tags = soup.find_all("a", class_=‘cover‘)
17     for tag in a_tags:
18         # 查找a标签下的所有img标签
19         imgs = tag.find_all("img")
20         for img in imgs:
21             # 获取所有img标签的src属性,返回的是<class ‘str‘>
22             pics = img.get(‘src‘)
23             filename = pics[-13:]
24             print(filename)
25             with open(‘pic2s/‘ + filename, ‘wb‘) as fd:
26                 picture = requests.get(pics).content
27                 fd.write(picture)
28
29
30 if __name__ == ‘__main__‘:
31     spider()

第一种解析

 1 import requests
 2 from bs4 import BeautifulSoup
 3
 4 PROXY = {
 5     ‘HTTPS‘: ‘116.209.55.208:9999‘
 6 }
 7
 8
 9 def spider():
10     url = ‘https://book.douban.com/latest?icn=index-latestbook-all‘
11     response = requests.get(url, proxies=PROXY)
12     soup = BeautifulSoup(response.content, ‘lxml‘)
13     imgs=soup.select(".cover img")
14     for img in imgs:
15         pics = img.get(‘src‘)
16         filename = pics[-13:]
17         print(filename)
18         with open(‘pic3s/‘ + filename, ‘wb‘) as fd:
19             picture = requests.get(pics).content
20             fd.write(picture)
21
22
23 if __name__ == ‘__main__‘:
24     spider()

第二种解析

三.爬取豆瓣图书图片

 1 import os
 2
 3 import requests
 4 from lxml import etree
 5
 6 j = 0
 7 for i in range(0, 6):
 8     r = requests.get(
 9         ‘https://book.douban.com/tag/%E7%A5%9E%E7%BB%8F%E7%BD%91%E7%BB%9C?‘ + ‘start=%d&type=T‘ % i * 20).content
10     books = etree.HTML(r)
11     imgs = books.xpath(‘//*[@id="subject_list"]/ul/li/div[1]/a/img/@src‘, stream=True)
12     if os.path.exists(‘downloads‘):
13         pass
14     else:
15         os.mkdir(‘downloads‘)
16     for img in imgs:
17         j = j + 1
18         with open(‘downloads/‘+str(j) + ‘.jpg‘, ‘wb‘) as fd:
19             picture = requests.get(img).content
20             fd.write(picture)

原文地址：https://www.cnblogs.com/min-R/p/10506650.html