Python实现使用request模块下载图片demo示例

# -*- coding: utf-8 -*-import requestsdef 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()