# -*- coding: utf-8 -*-# @Time : 2022/11/25 10:40# @Author : 红后# @Email : not_enabled@163.com# @blog : https://www.cnblogs.com/Red-Sun# @File : 实例3.py# @Software: PyCharmimportasyncioimporttimeasyncdefasync_function():# async修饰的异步函数,在该函数中可以添加await进行暂...
import threading import time class MyThread(threading.Thread): def __init__(self,id): threading.Thread.__init__(self) self.id = id def run(self): x = 0 time.sleep(10) print self.id if __name__ == "__main__": t1=MyThread(999) t1.start() t1.join() for i in range(5):...
import asyncio import time import aiohttp async def download_site(session, url): async with session.get(url) as response: print(f"下载了{response.content_length}行数据") async def download_all_sites(sites): async with aiohttp.ClientSession() as session: tasks = [] ...
前些日子写过几篇关于线程和进程的文章,概要介绍了Python内置的线程模块(threading)和进程模块(multiprocessing)的使用方法,侧重点是线程间同步和进程间同步。随后,陆续收到了不少读者的私信,咨询进程、线程和协程的使用方法,进程、线程和协程分别适用于何种应用场景,以及混合使用进程、线程和协程的技巧。归纳起来,核心的...
importasyncioasyncdeftest():awaitasyncio.sleep(3)return"123"asyncdefmain():result=awaittest()print(result)if__name__=='__main__':asyncio.run(main()) 添加结果回调 代码语言:javascript 代码运行次数:0 运行 AI代码解释 importthreadingimportasyncioasyncdefmyfun(index):print(f'[{index}]({threading...
Threading 实现异步运行 可以通过多线程实现任务异步执行,原理是当前任务直接开一个线程去干,自己去处理后面的任务,示例代码: 1234567891011121314151617181920212223242526272829 from threading import Threadfrom time import sleepdef async_call(fn): def wrapper(*args, **kwargs): Thread(target=fn, args=args, kwarg...
import threading def thread_function():try: # 一些可能引发异常的操作 result=10/0except ZeroDivisionErrorase: print(f"Exception in thread: {e}")if__name__ =="__main__": thread= threading.Thread(target=thread_function) thread.start() ...
python threading和async混用 python threading condition Python提供的Condition对象提供了对复杂线程同步问题的支持。Condition被称为条件变量,除了提供与Lock类似的acquire和release方法外,还提供了wait和notify方法。线程首先acquire一个条件变量,然后判断一些条件。如果条件不满足则wait;如果条件满足,进行一些处理改变条件后,...
importtimeimportasyncioasyncdeftake_order(table):print(f"开始为 {table} 号桌点餐")awaitasyncio.sleep(1)print(f"{table} 号桌点餐完成")asyncdefmain1():print("直接调用方式:")awaittake_order(1)# 必须等待这个完成awaittake_order(2)# 才能开始下一个awaittake_order(3)asyncdefmain2():print("...
异步编程通过使用async和await关键字来定义协程。协程是一种轻量级的线程,可以在运行时暂停和继续执行。 import asyncio async def my_coroutine(): print("Start coroutine") await asyncio.sleep(1) print("Coroutine completed") async def main(): await asyncio.gather(my_coroutine(), my_coroutine()) if ...