python下载图片

#encoding=utf8
import urllib
response = urllib.urlopen('https://img3.doubanio.com/icon/u48729794-40.jpg')
cat_img = response.read()
with open('cat_500_600.jpg','wb') as f:
    f.write(cat_img)

#encoding=utf8
import urllib.request
response = urllib.request.urlopen('https://img3.doubanio.com/icon/u48729794-40.jpg')
cat_img = response.read()
with open('cat_500_600.jpg','wb') as f:
    f.write(cat_img)