asyncio

import asyncio
import random
import functools


def page_done(url,task):
    print('下载结束:',url)
    print('task',task.result()) ##task.result() 获取回调内容


async def cron_scheduler():
    page = 1
    while True:
        url = '{}/{}'.format('https://www.baidu.com',page)
        job = cron_job(url)
        task = asyncio.ensure_future(job)  ##创建协程对象，并且加入到监控容器
        #task = asyncio.create_task(job)  效果跟ensure_future其实是一样的，在高版本3.7采用
        task.add_done_callback(functools.partial(page_done,url)) ##创建回调函数
        await asyncio.sleep(0.3)
        page += 1


async def  cron_job(url):
    n =random.randint(2,6)
    await asyncio.sleep(n)
    print('正在下载:',url)
    return url

loop = asyncio.get_event_loop()
loop.run_until_complete(cron_scheduler())

　　

import asyncio
import random
import functools


def page_done(url,task):
    print('下载结束:',url)
    print('task',task.result()) ##task.result() 获取回调内容


async def cron_scheduler():
    page = 1
while True:
        url = '{}/{}'.format('https://www.baidu.com',page)
        job = cron_job(url)
        task = asyncio.ensure_future(job)  ##创建协程对象，并且加入到监控容器
        #task = asyncio.create_task(job)  效果跟ensure_future其实是一样的，在高版本3.7采用
task.add_done_callback(functools.partial(page_done,url)) ##创建回调函数
await asyncio.sleep(0.3)
        page += 1


async def  cron_job(url):
    n =random.randint(2,6)
    await asyncio.sleep(n)
    print('正在下载:',url)
    return url

loop = asyncio.get_event_loop()
loop.run_until_complete(cron_scheduler())