Python爬虫系列（十一）网站Unsplash图片的爬取.ipynb · 小懒虫/pyspider-project

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Python爬虫系列（十一）网站Unsplash图片的爬取.ipynb 21.32 KB

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "截取后的图片的url是： https://images.unsplash.com/photo-1464983953574-0892a716854b?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1467189386127-c4e5e31ee213?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1469119674997-bc930fb66072?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1474436799594-1974f1add7ad?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1482862549707-f63cb32c5fd9?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1484815843298-2c13cbc1b66f?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1487017159836-4e23ece2e4cf?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1488217820102-3ef7cfe8bb4e?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1432866589724-ad10bb528bfa?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1473772564351-202a22a93101?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n"
     ]
    }
   ],
   "source": [
    "import requests\n",
    "from bs4 import BeautifulSoup\n",
    "headers={'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36'}\n",
    "url='https://unsplash.com/'\n",
    "res=requests.get(url,headers=headers)\n",
    "soup=BeautifulSoup(res.text,'lxml')\n",
    "all_link=soup.find_all('a',class_='cV68d')#注意这里class为缺省字，要写成class_\n",
    "for link in all_link:\n",
    "    img_str = link['style'] #a标签中完整的style字符串\n",
    "    first_pos = img_str.index('\"') + 1\n",
    "    second_pos = img_str.index('\"',first_pos)\n",
    "    img_url = img_str[first_pos: second_pos] #使用Python的切片功能截取双引号之间的内容\n",
    "    width_pos = img_url.index('&w=')\n",
    "    height_pos = img_url.index('&q=')\n",
    "    width_height_str = img_url[width_pos : height_pos]\n",
    "    img_url_final = img_url.replace(width_height_str, '')\n",
    "    print('截取后的图片的url是：', img_url_final)      "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
    "collapsed": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "开始网页get请求\n",
      "开始获取所有a标签\n",
      "开始创建文件夹\n",
      "D:\\BeautifulPicture 文件夹已经存在了，不再创建\n",
      "开始切换文件夹\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/reserve/wrev1ljvQ6KlfyljCQG0_lion.jpg?dpr=1&auto=compress,format&fit=crop&w=767&h=508&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=508\n",
      "截取后的图片的url是： https://images.unsplash.com/reserve/wrev1ljvQ6KlfyljCQG0_lion.jpg?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "wrev1ljvQ6KlfyljCQG0_lion.jpg.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1442508748335-fde9c3f58fd9?dpr=1&auto=compress,format&fit=crop&w=767&h=576&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=576\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1442508748335-fde9c3f58fd9?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1442508748335-fde9c3f58fd9.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1460751329354-07d91b47af38?dpr=1&auto=compress,format&fit=crop&w=767&h=511&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=511\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1460751329354-07d91b47af38?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1460751329354-07d91b47af38.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1468779065891-103dac4a7c48?dpr=1&auto=compress,format&fit=crop&w=767&h=431&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=431\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1468779065891-103dac4a7c48?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1468779065891-103dac4a7c48.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1483043012503-8a8849b4c949?dpr=1&auto=compress,format&fit=crop&w=767&h=512&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=512\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1483043012503-8a8849b4c949?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1483043012503-8a8849b4c949.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1483068612337-c045daaca40e?dpr=1&auto=compress,format&fit=crop&w=767&h=511&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=511\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1483068612337-c045daaca40e?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1483068612337-c045daaca40e.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1487790343276-2fe56a7d9439?dpr=1&auto=compress,format&fit=crop&w=767&h=514&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=514\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1487790343276-2fe56a7d9439?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1487790343276-2fe56a7d9439.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1490237014491-822aee911b99?dpr=1&auto=compress,format&fit=crop&w=767&h=512&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=512\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1490237014491-822aee911b99?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1490237014491-822aee911b99.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1445633629932-0029acc44e88?dpr=1&auto=compress,format&fit=crop&w=767&h=1151&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=1151\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1445633629932-0029acc44e88?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1445633629932-0029acc44e88.jpg 图片保存成功！\n",
      "a标签的style内容是： background-image:url(\"https://images.unsplash.com/photo-1448454050639-2f8d4bf26975?dpr=1&auto=compress,format&fit=crop&w=767&h=575&q=80&cs=tinysrgb&crop=&bg=\");width:0;height:0\n",
      "高度和宽度数据字符串是： &w=767&h=575\n",
      "截取后的图片的url是： https://images.unsplash.com/photo-1448454050639-2f8d4bf26975?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg=\n",
      "开始请求图片地址，过程会有点长...\n",
      "开始保存图片\n",
      "photo-1448454050639-2f8d4bf26975.jpg 图片保存成功！\n"
     ]
    }
   ],
   "source": [
    "import requests #导入requests 模块\n",
    "from bs4 import BeautifulSoup  #导入BeautifulSoup 模块\n",
    "import os  #导入os模块\n",
    "from urllib.parse import urlparse#分析出图片名字\n",
    "class BeautifulPicture():\n",
    "\n",
    "    def __init__(self):  #类的初始化操作\n",
    "        self.headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1'}  #给请求指定一个请求头来模拟chrome浏览器\n",
    "        self.web_url = 'https://unsplash.com/'  #要访问的网页地址\n",
    "        self.folder_path = 'D:\\BeautifulPicture'  #设置图片要存放的文件目录\n",
    "\n",
    "    def get_pic(self):\n",
    "        print('开始网页get请求')\n",
    "        r = self.request(self.web_url)\n",
    "        print('开始获取所有a标签')\n",
    "        all_a = BeautifulSoup(r.text, 'lxml').find_all('a', class_='cV68d')  #获取网页中的class为cV68d的所有a标签\n",
    "        print('开始创建文件夹')\n",
    "        self.mkdir(self.folder_path)  #创建文件夹\n",
    "        print('开始切换文件夹')\n",
    "        os.chdir(self.folder_path)   #切换路径至上面创建的文件夹\n",
    "\n",
    "        for a in all_a: #循环每个标签，获取标签中图片的url并且进行网络请求，最后保存图片\n",
    "            img_str = a['style'] #a标签中完整的style字符串\n",
    "            print('a标签的style内容是：', img_str)\n",
    "            first_pos = img_str.index('\"') + 1\n",
    "            second_pos = img_str.index('\"',first_pos)\n",
    "            img_url = img_str[first_pos: second_pos] #使用Python的切片功能截取双引号之间的内容\n",
    "            #获取高度和宽度的字符在字符串中的位置\n",
    "            width_pos = img_url.index('&w=')\n",
    "            height_pos = img_url.index('&q=')\n",
    "            width_height_str = img_url[width_pos : height_pos] #使用切片功能截取高度和宽度参数，后面用来将该参数替换掉\n",
    "            print('高度和宽度数据字符串是：', width_height_str)\n",
    "            img_url_final = img_url.replace(width_height_str, '')  #把高度和宽度的字符串替换成空字符\n",
    "            print('截取后的图片的url是：', img_url_final)\n",
    "            #截取url中参数前面、网址后面的字符串为图片名\n",
    "#             name_start_pos = img_url.index('photo')\n",
    "#             name_end_pos = img_url.index('?')\n",
    "#             img_name = img_url[name_start_pos : name_end_pos]\n",
    "            src=urlparse(img_url_final).path\n",
    "            img_name=src.split('/')[-1]\n",
    "            self.save_img(img_url_final, img_name) #调用save_img方法来保存图片\n",
    "\n",
    "    def save_img(self, url, name): ##保存图片\n",
    "        print('开始请求图片地址，过程会有点长...')\n",
    "        img = self.request(url)\n",
    "        file_name = name + '.jpg'\n",
    "        print('开始保存图片')\n",
    "        f = open(file_name, 'ab')\n",
    "        f.write(img.content)\n",
    "        print(file_name,'图片保存成功！')\n",
    "        f.close()\n",
    "\n",
    "    def request(self, url):  #返回网页的response\n",
    "        r = requests.get(url, headers=self.headers)  # 像目标url地址发送get请求，返回一个response对象。有没有headers参数都可以。\n",
    "        return r\n",
    "\n",
    "    def mkdir(self, path):  ##这个函数创建文件夹\n",
    "        path = path.strip()\n",
    "        isExists = os.path.exists(path)\n",
    "        if not isExists:\n",
    "            print('创建名字叫做', path, '的文件夹')\n",
    "            os.makedirs(path)\n",
    "            print('创建成功！')\n",
    "        else:\n",
    "            print(path, '文件夹已经存在了，不再创建')\n",
    "\n",
    "beauty = BeautifulPicture()  #创建类的实例\n",
    "beauty.get_pic()  #执行类中的方法"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'{\"errors\":[\"Unable to find endpoint\"]}'"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import requests\n",
    "from bs4 import BeautifulStoneSoup\n",
    "url='https://api.unsplash.com/feeds/home?after=331d3b40-2ca1-11e7-8080-80004066e5e9'\n",
    "headers={'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36'}\n",
    "res=requests.get(url,headers=headers)\n",
    "res.text"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "ParseResult(scheme='', netloc='', path=' https://images.unsplash.com/photo-1442508748335-fde9c3f58fd9', params='', query='dpr=1&auto=compress,format&fit=crop&w=1199&h=900&q=80&cs=tinysrgb&crop=&bg=', fragment='')"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from urllib.parse import urlparse\n",
    "# url=' https://images.unsplash.com/reserve/wrev1ljvQ6KlfyljCQG0_lion.jpg?dpr=1&auto=compress,format&fit=crop&q=80&cs=tinysrgb&crop=&bg='\n",
    "url=' https://images.unsplash.com/photo-1442508748335-fde9c3f58fd9?dpr=1&auto=compress,format&fit=crop&w=1199&h=900&q=80&cs=tinysrgb&crop=&bg='\n",
    "src=urlparse(url)\n",
    "# src=urlparse(url).path.strip()\n",
    "# src.split('/')[-1]\n",
    "src\n",
    "# src='asas'\n",
    "# src.lstrip('a')\n",
    "# src=\"https://images.unsplash.com/photo-1445633629932-0029acc44e88\"\n",
    "# save_path=\"G://unsplash/\"\n",
    "# img_name='1.jpg'\n",
    "# import urllib.request\n",
    "# urllib.request.urlretrieve(src, filename=save_path + img_name)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 68,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "https://images.unsplash.com/reserve/wrev1ljvQ6KlfyljCQG0_lion.jpg?dpr=1&auto=compress,format&fit=crop&w=1199&h=794&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/reserve/wrev1ljvQ6KlfyljCQG0_lion.jpg\n",
      "https://images.unsplash.com/photo-1442508748335-fde9c3f58fd9?dpr=1&auto=compress,format&fit=crop&w=1199&h=900&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1442508748335-fde9c3f58fd9\n",
      "https://images.unsplash.com/photo-1460751329354-07d91b47af38?dpr=1&auto=compress,format&fit=crop&w=1199&h=799&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1460751329354-07d91b47af38\n",
      "https://images.unsplash.com/photo-1468779065891-103dac4a7c48?dpr=1&auto=compress,format&fit=crop&w=1199&h=674&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1468779065891-103dac4a7c48\n",
      "https://images.unsplash.com/photo-1483043012503-8a8849b4c949?dpr=1&auto=compress,format&fit=crop&w=1199&h=800&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1483043012503-8a8849b4c949\n",
      "https://images.unsplash.com/photo-1483068612337-c045daaca40e?dpr=1&auto=compress,format&fit=crop&w=1199&h=799&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1483068612337-c045daaca40e\n",
      "https://images.unsplash.com/photo-1487790343276-2fe56a7d9439?dpr=1&auto=compress,format&fit=crop&w=1199&h=803&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1487790343276-2fe56a7d9439\n",
      "https://images.unsplash.com/photo-1490237014491-822aee911b99?dpr=1&auto=compress,format&fit=crop&w=1199&h=800&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1490237014491-822aee911b99\n",
      "https://images.unsplash.com/photo-1445633629932-0029acc44e88?dpr=1&auto=compress,format&fit=crop&w=1199&h=1799&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1445633629932-0029acc44e88\n",
      "https://images.unsplash.com/photo-1448454050639-2f8d4bf26975?dpr=1&auto=compress,format&fit=crop&w=1199&h=899&q=80&cs=tinysrgb&crop=&bg=\n",
      "https://images.unsplash.com/photo-1448454050639-2f8d4bf26975\n"
     ]
    }
   ],
   "source": [
    "from selenium import webdriver#实现自动下拉\n",
    "from lxml import etree#定位元素（更加高效）\n",
    "from urllib.parse import urlparse#解析图片的名称\n",
    "import urllib.request#urlretrieve()下载保存图片\n",
    "import re\n",
    "driver=webdriver.Chrome('G:/chromedriver/chromedriver.exe')\n",
    "driver.get('https://unsplash.com/')\n",
    "html=driver.page_source\n",
    "selector=etree.HTML(html)\n",
    "all_urls=selector.xpath('//a[@class=\"cV68d\"]/@style')\n",
    "for url in all_urls:\n",
    "    src=re.findall(r'url\\(\\\"(.*?)\\\"\\)',url, re.S)[0]\n",
    "    print(src)\n",
    "    print(urlparse(' '+src).path.strip())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "from selenium import webdriver#实现自动下拉\n",
    "from lxml import etree#定位元素（更加高效）\n",
    "from urllib.parse import urlparse#解析图片的名称\n",
    "import urllib.request#urlretrieve()下载保存图片\n",
    "import re\n",
    "import time\n",
    "\n",
    "\n",
    "class Unsplash:\n",
    "    #初始化构造函数\n",
    "    def __init__(self):\n",
    "        self.url='https://unsplash.com/'#请求地址\n",
    "        self.save_path=\"G://unsplash/\"#图片保存路径\n",
    "        self.driver=webdriver.Chrome('G:/chromedriver/chromedriver.exe')\n",
    "        #self.driver = webdriver.PhantomJS()\n",
    "    #实现下拉动作，并返回网页源代码，times:下拉次数\n",
    "    def do_scroll(self,times):\n",
    "        #打开目标网址\n",
    "        driver=self.driver\n",
    "        driver.get(self.url)\n",
    "        #模拟下拉操作\n",
    "        for i in range(times):\n",
    "            print('正在下拉'+str(i+1)+'次：')\n",
    "            driver.execute_script(\"window.scrollTo(0, document.body.scrollHeight);\")\n",
    "            print('等待'+str(i+1)+'次网页加载')\n",
    "            time.sleep(40)\n",
    "        #解析网页源码\n",
    "        html=etree.HTML(driver.page_source)\n",
    "        return html\n",
    "\n",
    "    #下载图片保存到本地\n",
    "    def save_img(self,src,img_name):\n",
    "        urllib.request.urlretrieve(src, filename=self.save_path + img_name)\n",
    "\n",
    "    def get_pic(self, html):\n",
    "\n",
    "        #获取a标签的style内容\n",
    "        all_uls = html.xpath('//a[@class=\"cV68d\"]/@style')\n",
    "        # 获取图片下载地址，\n",
    "        for url in all_uls:\n",
    "            #使用正则表达式获取想要的src地址\n",
    "            src = re.findall(r'url\\(\\\"(.*?)\\\"\\)',url,re.S)[0]\n",
    "            print(src)\n",
    "            #使用urlparse解析地址，使用path的内容，去除不需要的参数\n",
    "            fina_src=urlparse(' ' + src).path.strip()\n",
    "            # 保存图片的名字\n",
    "            img_name = fina_src.split('/')[-1]+'.jpg'\n",
    "            print(fina_src,img_name)\n",
    "            self.save_img(src,img_name)\n",
    "\n",
    "    def main(self):\n",
    "        #获取源码\n",
    "        html=self.do_scroll(1)\n",
    "        print(\"开始下载图片\")\n",
    "        self.get_pic(html)\n",
    "img=Unsplash()\n",
    "img.main()"
   ]
  }
 ],
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