python获取网页中所有图片并筛选指定分辨率的方法_Python

压测时，图片太少，想着下载网页中的图片，然后过滤指定分辨率，但网页中指定分辨率的图片太少了（见下）
后使用格式工厂转换图片

									import urllib.request   # 导入urllib模块

									import re     # 导入re模块

									import os

									from PIL import Image

									htmlurl = 'http://www.win4000.com/wallpaper_detail_134824_3.html'

									downloadpath = 'C:\\Users\\yaowanjun\\Desktop\\img\\'

									def getHTML(htmlurl):

									  req = urllib.request.urlopen(htmlurl)

									  buf = req.read()

									  return buf.decode('utf-8')

									def downloadImg(buf):

									  req = r'src="(.+?\.jpg)"' #正则表达式，匹配图片格式

									  imgreq = re.compile(req) #编译正则表达式

									  imglist = re.findall(imgreq, buf)

									  # print(imglist)

									  x = 0

									  if not os.path.isdir(downloadpath):#若没有则创建

									    os.makedirs(downloadpath)

									  paths = downloadpath

									  for imgurl in imglist:

									    f = open(paths + str(x) +'.jpg',"wb")  #打开文件

									    req = urllib.request.urlopen(imgurl)

									    buf = req.read()       #读出文件

									    f.write(buf)

									    f.close()

									    x = x + 1

									  return imglist

									def saveImg():

									  for filenumber in os.walk(downloadpath):

									    # print(filenumber[2])

									    for files in filenumber[2]:

									      # print(files)

									      singleimg = Image.open(downloadpath + files)

									      singleimg.close()

									      #print(singleimg.size, singleimg.width, singleimg.height)

									      if singleimg.size == (1920, 1080):

									        print(singleimg)

									      else:

									        os.remove(downloadpath + files)

									buf = getHTML(htmlurl)

									downloadImg(buf)

									saveImg()