loop=get_event_loop() 当前上下文的事件循环
loop.call_later(time_delay,callback,arg)
loop.call_soon(callback,agr)
asyncio.set_event_loop() 设定上下文事件循环
asyncio.new_event_loop() 创建
loop.run_forever()
异步函数：
import time
import asyncio
定义异步函数
async def hello():
print('Hello World:%s' % time.time())
def run():
for i in range(5):
loop.run_until_complete(hello())
loop = asyncio.get_event_loop()
if name =='main':
run()
输出结果：
Hello World:1562248241.350658
Hello World:1562248241.350658
Hello World:1562248241.350658
Hello World:1562248241.350658
Hello World:1562248241.350658
异步requests库:aiohttp
import asyncio
from aiohttp import ClientSession
tasks = []
url = "https://www.baidu.com/{}"
async def hello(url):
async with ClientSession() as session:
async with session.get(url) as response:
response = await response.read()
print(response)
if name == 'main':
loop = asyncio.get_event_loop()
loop.run_until_complete(hello(url))
import asyncio
async def main():
print('Hello ...')
await asyncio.sleep(1)
print('... World!')
Python 3.7+
asyncio.run(main())
