代码：

# -*- coding: utf-8 -*-
import urllib2
import urllib
import re
import os
import easygui as g
def open_url(url):
    req = urllib2.Request(url)
    req.add_header("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.99 Safari/537.36")
    page = urllib2.urlopen(req)
    html = page.read().decode("utf-8")
    return html
def get_img(html):
    p = r'http://.*?\.jpg|http://.*?\.png|http://.*?\.gif|//.*?\.jpg|//.*?\.png|//.*?\.gif'
    imglist = re.findall(p,html)
    for each in imglist:
        filename = (each.split("/")[-1])
        img_url = "http" + each.split("http")[-1]
        with open(u"图片链接.txt","a") as t:
            t.write(img_url+"\n")
        try:
            urllib.urlretrieve(img_url,filename)
        except:
            pass
if __name__ == '__main__':
    try:
        url = g.enterbox(msg=u"请输入要抓取图片的链接：")
        path_download = g.diropenbox(msg=u"请选择要保存图片的路径",title=u"浏览",default=os.getcwd())
    except:
        exceptionbox()
    os.chdir(path_download)
    get_img(open_url(url))
    g.msgbox(u"图片抓取完毕！")