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 gevent
from gevent import monkey
import urllib.request
monkey.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.com GET: https://www.cnblogs.com GET: https://www.huya.com 227 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 gevent
from gevent import monkey
import urllib.request
monkey.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呐喊教程。
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