python协程需要注意的

python协程需要注意的点

都在注释里

-- coding: utf-8 --

import asyncio
import time
from geeker import schedule

async def first():
await asyncio.sleep(1)
return "result first"

async def second():
await asyncio.sleep(1)
return "result second"

发送请求

async def get_data(y):
await first()
await second()
print(f'{y}号任务完成')

def callback(*args,**kwargs):
print('callback')

def run():
print('in run...')
# 如果在线程中执行任务,则必须使用这种方式创建loop
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)

semaphore必须在loop创建之后再创建

semaphore = asyncio.Semaphore(40)

协程任务

tasks = {get_data(1), get_data(2), get_data(3), get_data(4)}

tasks = asyncio.wait(tasks, loop=loop)

loop.run_until_complete(tasks)

loop.close()
print("over")

if name == 'main':

schedule.every(3).seconds.do(run)
while True:
schedule.run_pending()
time.sleep(1)