python网络图片爬取存储全代码

#图片爬取全代码
import requests
import os
url = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1526377335903&di=" \
      "804e31176babc6d47766261d0b02ca38&imgtype=0&src=http%3A%2F%2Fimg.mp." \
      "sohu.com%2Fq_mini%2Cc_zoom%2Cw_640%2Fupload%2F20170810%2Fc25e385ca8e24cdb" \
      "805a38ad5fcb52b9_th.jpg"
root = "D://pics//"
path = root + url.split('/')[-1]
try:
    if not os.path.exists(root):
        os.mkdir(root)
    if not os.path.exists(path):
        r = requests.get(url)
        with open(path,'wb') as f:
            f.write(r.content)
            f.close()
            print("文件保存成功")
    else:
        print("文件已存在")
except:
    print("爬取失败")