图片下载---使用gevent爬数据

代码：

 import urllib.request
 import gevent
 from gevent import monkey

 monkey.patch_all()

 def downloader(img_name,img_url):
     req = urllib.request.urlopen(img_url)
     img_content = req.read()
     with open(img_name,"wb") as f:
         f.write(img_content)

 def main():
     gevent.joinall([
         # gevent.spawn(函数名,"要储存的文件名","图片网址")
         gevent.spawn(downloader,"2.jpg","https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1566476963330&di=50d0898e8dd5cdcd5b898d79726cf3c7&imgtype=0&src=http%3A%2F%2Fhbimg.b0.upaiyun.com%2Fb4870f80a9accb1cce5eaf8e186fe9938e2091d17d4ce-qoXBpf_fw658"),
         gevent.spawn(downloader,"3.jpg","https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1566476963329&di=c543415f9006fd8a14121fd40da2bde5&imgtype=0&src=http%3A%2F%2Fimg1.ph.126.net%2Fv3aon1cLTdZw0xUYgtmxMA%3D%3D%2F6597693189749236541.jpg")
     ])

 if __name__ == '__main__':
     main()