#!/usr/bin/env python
#-*- coding: utf-8 -*-
import requests
from bs4 import BeautifulSoup
# 加上请求头，模拟浏览器访问，防止被发现是爬虫
headers = {   
 'User-Agent': 
'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36'
}
def download(url):    
    r = requests.get(url)    
    if r.status_code != 200:
        return    
#http://img.ui.cn/data/file/2/5/2/909252.jpg    
# split，获取最后一个/和.之间的数字作为文件名
  filename = url.split("/")[-1].split(".")[-2]    
  target = "./{}.jpg".format(filename)    
  with open(target, "wb") as fs:        
  fs.write(r.content)    
  print("%s => %s" % (url, target))

def main():   
 # 获取1 ~ 10页的图片    
  for page in range(1, 10):        
  # 找规律，发现只有替换请求链接的page参数即可进入相应页面
        url = "http://www.ui.cn/?p={}#project".format(page)
        r = requests.get(url,headers=headers)        
# 检查是否正常访问，异常访问返回的状态码不是200，异常就跳过
        if r.status_code != 200: 
           continue        
# 提取页面的图片，得到地址，然后下载
        soup = BeautifulSoup(r.text, "html.parser")
        imgs = soup.select('ul > li > div.cover.pos > a > img')
        for img in imgs:
            src = img.get("data-original")
            download(src)

if __name__ == '__main__':
    main()