Tasks that spend much of their time waiting for external events are generally good candidates for threading. This is due to interactions with the GIL that essentially limit one Python thread to run at a time. Getting multiple tasks running simultaneously requires a non-standard implementation of Python, writing some of your code in a different language, or using multiprocessing which comes with some extra overhead.īecause of the way CPython implementation of Python works, threading may not speed up all tasks. The threads may be running on different processors, but they will only be running one at a time. It’s tempting to think of threading as having two (or more) different processors running on your program, each one doing an independent task at the same time. But for most Python 3 implementations the different threads do not actually execute at the same time: they merely appear to. This means that your program will have two things happening at once. Upon completion you will receive a score so you can track your learning progress over time:Ī thread is a separate flow of execution. Take the Quiz: Test your knowledge with our interactive “Python Threading” quiz. If you’re not sure if you want to use Python threading, asyncio, or multiprocessing, then you can check out Speed Up Your Python Program With Concurrency.Īll of the sources used in this tutorial are available to you in the Real Python GitHub repo. If you need a refresher, you can start with the Python Learning Paths and get up to speed. This article assumes you’ve got the Python basics down pat and that you’re using at least version 3.6 to run the examples. How to use the common tools that Python threading provides.How to create threads and wait for them to finish.If you’ve got some experience in Python and want to speed up your program using threads, then this tutorial is for you! Python threading allows you to have different parts of your program run concurrently and can simplify your design. Watch it together with the written tutorial to deepen your understanding: Threading in Python Watch Now This tutorial has a related video course created by the Real Python team.
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