写在前面

环境：Ubuntu16.04
编辑器：Pycharm 2017.1.5

直接贴代码了，注释写在里面。

import os
import requests
from bs4 import BeautifulSoup

imgUrls =[]#存放所有图片的URL

def get_Html_ImgUrl(url):
    '''
    获取网页的源代码和图片的地址
    存放在imgUrls这个列表里
    '''

    #获取网页源代码
    headers = {'User-Agent':'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36'}
    html = requests.get(url, headers=headers)
    html.encoding = 'utf-8'
    soup = BeautifulSoup(html.text, 'lxml')

    #获取图片的地址并且存放在imgUrls列表里
    for i in soup.find_all('img', class_='BDE_Image'):
        imgUrls.append(i['src'])

def save_imgs():
    #保存图片
    for i,url in enumerate(imgUrls):
        pic = requests.get(url).content
        with open('./'+str(i)+'.jpg', 'wb') as f:#保存至根目录下
             f.write(pic)
def main():
    url = 'http://tieba.baidu.com/p/3210271432?pn='
    for i in range(1,10):
        try:
            get_Html_ImgUrl(url+str(i))
        except:
            pass
    save_imgs()

print('爬取完毕')
if __name__ == '__main__':
    main()

结果如下

image.png