编程

···python

import asyncio

import uvloop

asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())

@asyncio.coroutine

def hello():

print("Hello world!")

# 异步调用asyncio.sleep(1):

r = yield from asyncio.sleep(1)

print("Hello again!")

# 获取EventLoop:

loop = asyncio.get_event_loop()

# 执行coroutine

loop.run_until_complete(hello())

loop.close()

···