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）：

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