多进程:multiprocessing,利用多核CPU的能力,真正的并行执行任务 异步IO:asyncio,在担心称利用CPU和IO同时执行的原理,实现函数异步执行 使用Lock对资源加锁,防止冲突访问 使用Queue实现不同线程/进程之间的数据通信,实现生产者-消费者模式 使用线程池Pool和进程池Pool,简化线程/进程的任务提交,等待结束,获取结果 使用subp...
4、AsynchronousI / O(异步IO): 用户进程发起read操作之后,立刻就可以开始去做其它的事。 而另一方面,从kernel的角度,当它受到一个asynchronous read之后,首先它会立刻返回, 所以不会对用户进程产生任何block。然后,kernel会等待数据准备完成,然后将数据拷贝到用户内存, 当这一切都完成之后,kernel会给用户进程发送一...
Note The function is implemented using a busy loop (non-blocking call and short sleeps). Use the asyncio module for an asynchronous wait: see asyncio.create_subprocess_exec. p.communicate() 和子进程交互,返回一个元祖,returns a tuple (stdout_data, stderr_data) p.terminate() 终...
# 使用 subprocess 执行命令 process = subprocess.Popen(execute_command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) # 等待较长时间,例如 30 秒 timeout_seconds = 30 start_time = time.time() while time.time() - start_time < timeout_seconds: if process.poll() is not None:...
Note The function is implemented using a busy loop (non-blocking call and short sleeps). Use the asyncio module for an asynchronous wait: see asyncio.create_subprocess_exec. p.communicate() 和子进程交互,返回一个元祖,returns a tuple (stdout_data, stderr_data) ...
1 使用subprocess模块,来调用系统命令,执行ping 192.168.11.xxx 命令 2 调用系统命令执行ping命令的时候,会有返回值(ping的结果),需要用到stdout=fnull, stderr=fnull方法,屏蔽系统执行命令的返回值 常规版本(代码) import osimport timeimport subprocess ...
such that it blocks waiting for the OS pipe buffer to accept more data. Use Popen.communicate() when using pipes to avoi Note The function is implemented using a busy loop (non-blocking call and short sleeps). Use the asyncio module for an asynchronous wait: see asyncio.create_subprocess_...
redis-py - The Python client for Redis. Asynchronous Clients motor - The async Python driver for MongoDB.Date and TimeLibraries for working with dates and times.Arrow - A Python library that offers a sensible and human-friendly approach to creating, manipulating, formatting and converting dates,...
There is quite a bit to unpack here. Let’s start with the main entry point of the program. The first new thing we do with the asyncio module is to obtain the event loop. The event loop handles all of the asynchronous code. Then, the loop is run until complete and passed themainfun...
/usr/bin/python #-*-coding:utf-8-*- import os,time,signal,platform,subprocess class Timeout...