process queue The bottom layer uses threads to transfer data

import threading
import multiprocessing def main():
queue = multiprocessing.Queue()
print(threading.active_count())
queue.put('start thread')
print(threading.active_count()) if __name__ == '__main__':
main() # 1
# 2

Python Development 【 note 】:what? process queue It can also produce threads ! More articles about

  1. python Development Notes - adopt xml Quick access to data

    Today I'm doing python How to pass the Development Notes xml Quick access to data , The following is to transfer nltk Corpus as an example : import nltk nltk.download() showing info https://raw.g ...

  2. Python Learning notes - day13 - Processes and threads

    summary We all know windows It's an operating system that supports multitasking . What do you mean “ multitasking ” Well ? In short , The operating system can run multiple tasks at the same time . For example , You're surfing the Internet with your browser , While listening MP3, I'm using it on one side Word Catch up on homework , That's how much ...

  3. Python Summary of study notes 【 Network programming 】【 Threads / process / coroutines /IO Multichannel model /select/poll/epoll/selector】

    One .socket( Single link ) 1.socket: Application layer and TCP/IP Intermediate software abstraction layer for protocol family communication , It's a set of interfaces . In design mode ,Socket It's a facade pattern , It's complicated TCP/IP The protocol family is hidden in Socke ...

  4. python Learning notes 8 Processes and threads ( Advanced )

    What is thread (thread)? Thread is the smallest unit that the operating system can schedule operations . It is included in the process , Is the actual operation unit in the process . A thread refers to a single sequential control flow in a process , Multiple threads can be concurrent in one process , Each thread executes in parallel ...

  5. python Learning notes —— Daemon

    1 Basic description Daemon : It is an independent background service process in the system , characteristic : Perform a task independently and periodically with the terminal , It has a long life cycle , It usually starts and stops with the system . shortcoming : The creation and destruction of process need to consume more computer resources . 2 Reference resources ...

  6. python Development Notes -python call webservice Interface

    Description of the environment : Operating system version : root@9deba54adab7:/# uname -a Linux 9deba54adab7 --generic #-Ubuntu SMP Thu Dec :: UTC ...

  7. Java Development Notes ( Ninety-eight ) utilize Callable Start thread

    How to use Runnable Interface build thread task , This method really facilitates the reuse and sharing of thread code , However Runnable It's not like a public method has a return value , It is impossible to transfer the processing result of thread code to the outside , The result is that the external does not know whether the thread ...

  8. Java Development Notes ( ninety-seven ) utilize Runnable Start thread

    The basic usage of thread is introduced , It's reasonable enough for ordinary occasions , Just every time a new thread is created , You have to define special thread classes separately , It's really expensive . Note that the only thing that really needs to be rewritten inside the new thread is run Method , It's actually a code block , After the thread is started ...

  9. python Development Notes -Python3.7+Django2.2 Docker Image building

    Introduction to the target image environment : operating system :ubuntu16.04 python edition :python 3.7.4 django edition :2.2 Operation steps : 1.  Local installation docker Environmental Science ( A little )2. Pull ubunut Appoint ...

Random recommendation

  1. Using delegation and Lambada Create and call webapi Interface

    Preface Now the project uses webapi, There are the following problems :    1. With the increase of development, interfaces gradually increase, which is quite huge . 2. Interface calls are not easy to manage . These are the main problems , There's an idea for that : If every interface is managed by a configuration file ...

  2. ( Nine )errno and perror、 standard IO

    3.1.6. Some details of file reading and writing 3.1.6.1.errno and perror(1)errno Namely error number, It means wrong number .linux The system has made a number for various common errors , When the function is executed incorrectly , The function will ...

  3. AJAX The request contains an array solution

    When we send AJAX When the requested data contains an array , It can't be like ordinary JSON data , Directly on data It's sent to the backstage , For example, there is such a data need to be sent to the background : { "orderId": 22, &quo ...

  4. Give Way Entity Framework Support MySql database ( Reprint )

    Reprinted address :http://www.cnblogs.com/wintersun/archive/2010/12/12/1903861.html Entity Framework 4.0 You can also support the famous ...

  5. ios Agent design pattern

    The role of proxy design patterns :     1.A Object to monitor B Some behavior of the object ,A Become B Agent for      2.B The object wants to tell A Object some things ,A Become B Agent for     Summary of agent design patterns :     If you want to listen to other people's behavior , that ...

  6. tp3.2 Summary (1)

    Entrance file :index.php Directory structure : The core ,Thinkphp public resource ,public jq Uploaded pictures, etc Application directory ,application Housing module common: Module based public directory , Common function naming : class : ...

  7. UE4 Physical animation uses

    Rigid Body Body The creation of . Create... For important bones Body, Guarantee Body Control is the performance and change of relatively large bones . Need to be right Root establish Body And bind the , Set to Kinematic And no physical . as a result of UPrimi ...

  8. yml The latter configuration covers the former

    Here's the thing : a: b: c: tomcat d: hoho # There's a lot of space between them a: b: c: tomcat In this case , The latter configuration will cover all previous configurations , namely a.d = hoho It will also be covered y ...

  9. go Standard library learning -sync Mutually exclusive

    https://studygolang.com/pkgdoc The import method : import "sync" sync Packages provide basic synchronization primitives , If the mutex . except Once and WaitGroup type ...

  10. Shell---- Simple finishing

    ------------------------------------------------------------------Shell Script --------------------------- ...