Mastering Python Concurrency: A Practical Guide

Explore Threading and Multiprocessing for Efficient Parallelism

Max N
2 min readMar 13, 2024

Concurrency in Python, the ability to execute multiple tasks simultaneously, is crucial for optimizing performance in modern applications. While Python’s Global Interpreter Lock (GIL) poses challenges to true parallelism, libraries like threading and multiprocessing provide effective ways to leverage concurrency.

In this guide, we’ll delve into the fundamentals of Python concurrency using threading and multiprocessing, offering practical examples to illustrate their usage.

Understanding Threading

Threading allows Python to perform multiple tasks concurrently within a single process. Though threads share the same memory space, they execute independently, making them ideal for I/O-bound operations where tasks often wait for external resources.

Creating Threads

Let’s start with a basic example of threading:

import threading

def print_numbers():
for i in range(1, 6):
print("Thread 1:", i)

def print_letters():
for letter in ['a', 'b', 'c', 'd', 'e']:
print("Thread 2:", letter)

thread1 = threading.Thread(target=print_numbers)
thread2 =…

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Max N
Max N

Written by Max N

A writer that writes about JavaScript and Python to beginners. If you find my articles helpful, feel free to follow.