python基于gevent实现并发下载器代码实例

Python  /  管理员 发布于 7年前   148

这篇文章主要介绍了python基于gevent实现并发下载器代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

并发下载原理

import geventfrom gevent import monkeyimport urllib.requestmonkey.patch_all()def my_download(url):    print('GET: %s' % url)    resp = urllib.request.urlopen(url)    data = resp.read()    print('%d bytes received from %s.' % (len(data), url))gevent.joinall([    gevent.spawn(my_download, "https://www.baidu.com"),    gevent.spawn(my_download, "https://www.cnblogs.com"),    gevent.spawn(my_download, "https://www.huya.com")  ])

运行结果：

GET: https://www.baidu.comGET: https://www.cnblogs.comGET: https://www.huya.com227 bytes received from https://www.baidu.com.46411 bytes received from https://www.cnblogs.com.353563 bytes received from https://www.huya.com.

实现多张图片同时下载

import geventfrom gevent import monkeyimport urllib.requestmonkey.patch_all()def my_download(url, image_path):  print('GET: %s' % url)  resp = urllib.request.urlopen(url)  data = resp.read()  print('%d bytes received from %s.' % (len(data), url))    with open(image_path, "wb") as f:    f.write(data)gevent.joinall([  gevent.spawn(my_download, "https://huyaimg.msstatic.com/cdnimage/anchorpost/1099/4c/73ff3e6ce165fb658b2082d4d126c6_2168_1544414129.jpg", "1.jpg"),  gevent.spawn(my_download, "https://huyaimg.msstatic.com/cdnimage/anchorpost/1020/03/7949816c55f45b9adc9f03d9330af3_2168_1542941499.jpg", "2.jpg"),   gevent.spawn(my_download, "https://huyaimg.msstatic.com/cdnimage/anchorpost/1061/55/8071537fa10120c43c5a1359a88530_2168_1545302709.jpg", "3.jpg"),])

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。