---
title: "What is Python’s Global Interpreter Lock (GIL)?"  
description: "What is Python’s Global Interpreter Lock (GIL)?"  
author: "Ravi Vishwakarma"  
published: 2025-08-26  
updated: 2025-08-27  
canonical: https://www.mindstick.com/forum/161890/what-is-python-s-global-interpreter-lock-gil  
category: "python"  
tags: ["python", "Python 3"]  
reading_time: 1 minute  

---

# What is Python’s Global Interpreter Lock (GIL)?

**What is [Python](https://www.mindstick.com/articles/75378/simple-yet-useful-tips-when-using-python)’s [Global](https://www.mindstick.com/articles/13127/macro-and-microeconomics-concepts-in-relation-to-global-organization-management) Interpreter Lock (GIL)?**

## Replies

### Reply by Anubhav Sharma

## Python’s Global Interpreter Lock (GIL):

1. [GIL is a mutex (lock)](https://www.mindstick.com/forum/161506/how-does-python-s-gil-global-interpreter-lock-affect-multithreading-in-ai-ml-applications) that allows only **one thread to execute Python bytecode at a time**.
2. It prevents true multi-threaded CPU-bound parallelism.
3. For I/O-bound tasks → use **multithreading**.
4. For CPU-bound tasks → use **multiprocessing** to bypass GIL.


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Original Source: https://www.mindstick.com/forum/161890/what-is-python-s-global-interpreter-lock-gil

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