代码如下：
import asyncioasync def wget(host): ???print(‘wget %s...‘ % host) ???connect = asyncio.open_connection(host, 80) ???reader, writer = await connect ???header = ‘GET / HTTP/1.0\r\nHost: %s\r\n‘ % host ???writer.write(header.encode(‘utf-8‘)) ???await writer.drain() ???while True: ???????line = await reader.readline() ???????if line == b‘\r\n‘: ???????????break ???????print(‘%s header > %s‘ % (host, line.decode(‘utf-8‘).rstrip())) ???????writer.close()loop = asyncio.get_event_loop()tasks = [wget(host) for host in [‘www.sina.com.cn‘, ‘www.sohu.com‘, ‘www.163.com‘]]loop.run_until_complete(asyncio.wait(tasks))loop.close()
上面的写法只适用与python 3.5及其之后的版本，再python 3.5之前，用
请注意，async和await是针对coroutine的新语法，要使用新的语法，只需要做两步简单的替换：
- 把
@asyncio.coroutine替换为async； - 把
yield from替换为await。
用asyncio的异步网络连接来获取sina、sohu和163的网站首页
原文地址：https://www.cnblogs.com/ncuhwxiong/p/8183035.html