多任务+异步协程

import asyncio
import time
import aiohttp

class Start_task(object):

    def __init__(self):
        self.tasks = []
    async def func(self):
        '''协程任务'''
        print("协程任务")

    def callback(self):
        '''回调函数'''
        pass

    def start_task(self):

        loon = asyncio.get_event_loop()
        loon.run_until_complete(asyncio.await(self.tasks))






import asyncio
from time import sleep
import time
#函数的定义
async def get_request(url):
    print('正在请求:',url)
    await asyncio.sleep(3)
    print('请求结束:',url)
    return 'bobo'

def parse(task):
    print('i am task callback()!!!=----',task.result())


#创建3个协程对象
urls = [
    '1.com','2.com','3.com'
]

start = time.time()
#任务列表：存储的是多个任务对象
tasks = []
for url in urls:
    c = get_request(url)
    task = asyncio.ensure_future(c)
    #绑定回调
    task.add_done_callback(parse)
    tasks.append(task)

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.wait(tasks))

print('总耗时：',time.time()-start)