Python实现使用request模块下载图片demo示例

本文实例讲述了Python实现使用request模块下载图片。分享给大家供大家参考，具体如下：

利用流传输下载图片

# -*- coding: utf-8 -*-
import requests
def download_image():
 """
 demo:下载图片
 :return:
 """
 headers = {"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"}
 url = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1491366667515&di=8dad3d86740af2c49d3d0461cfd81f63&imgtype=0&src=http％3A％2F％2Fhdn.xnimg.cn％2Fphotos％2Fhdn521％2F20120528％2F1615％2Fh_main_LBxi_2917000000451375.jpg"
 response = requests.get(url, headers=headers, stream=True)
 #print str(response.text).decode('ascii').encode('gbk')
 with open('demo.jpg', 'wb') as fd:
   for chunk in response.iter_content(128):
     fd.write(chunk)
download_image()
def download_image_improved():
 """demo: 下载图片"""
 #伪造headers信息
 headers = {
   "User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36"}
 #限定URL
 url = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1491366667515&di=8dad3d86740af2c49d3d0461cfd81f63&imgtype=0&src=http％3A％2F％2Fhdn.xnimg.cn％2Fphotos％2Fhdn521％2F20120528％2F1615％2Fh_main_LBxi_2917000000451375.jpg"
 response = requests.get(url, headers=headers, stream=True)
 from contextlib import closing
 #用完流自动关掉
 with closing(requests.get(url, headers=headers, stream=True)) as response:
   #打开文件
   with open('demo1.jpg', 'wb') as fd:
     #每128写入一次
     for chunk in response.iter_content(128):
       fd.write(chunk)
download_image_improved()

运行结果（在当前目录下下载了一个demo.jpg文件）：

希望本文所述对大家Python程序设计有所帮助。

来源：https://blog.csdn.net/u013205877/article/details/69371413