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 = "http://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 = "http://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）：



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