網(wǎng)站做了防盜鏈措施 ，請(qǐng)求的時(shí)候在請(qǐng)求頭里加上referer就可以了。
demo代碼如下：

#! /usr/bin/env python
# -*- coding: utf-8 -*-
""" 
@author:hp 
@file: 6.5.py 
@time: 2018/6/5
"""
import requests,os

def download_picture():

    url = 'http://img.plantphoto.cn/image2/b/2391908.jpg'
    header = {'Referer': 'http://www.plantphoto.cn/tu/2391908'}
    res = requests.get(url,headers=header,stream=True)
    with open(os.getcwd() + os.sep + '2391908.jpg',mode= 'wb') as f:
            f.write(res.content)

if __name__ == '__main__':
    download_picture()