import requests
def down_load(img_url,file_name):
response=requests.get(img_url)
img_data=response.content
with open(file.name,'wb') as f:
f.write(img_data)
down_load('http://www.baidu.com/img/bd_logol.png', 'baidu.png')
该代码能够下载百度官网logo