Dynamic, Lazy Dependency Injection in Python

Automatic Python dependency injection to make your code more testable, decoupled, uncomplicated and readable.

Log Breadcrumbs: only show Logs leading up to an Error

How to log breadcrumbs using Python's built-in logging package

Let’s Write a Composable, Easy-to-Use Caching Package in Python

Easy, user-friendly caching that tailors to all your needs

Turn Your Python Function into a Decorator with One Line of Code

A new way to write shorter, clearer, and more readable Python decorators that also act as a context manager

Don’t Crash Your App: Load Records from the Database in Batches for Better Performance

Save your Python app’s performance by efficiently loading query

How to Store and Query 100 Million Items Using Just 77MB with Python Bloom Filters

Perform lightning-fast, memory efficient membership checks in Python with this need-to-know data structure

Python: __init__ is NOT a constructor: a deep dive in Python object creation

Tinkering with Python’s constructor to create fast, memory-efficient classes

Creating and Publishing Your Own Python Package for Absolute Beginners

Create, build an publish a Python Package in 5 minutes

Should You Use Slots? How Slots Affect Your Class, and When and How to Use Them

One line of code for a 20% performance increase?

4 Easy-to-Implement, High-Impact Tweaks for Supercharging Your Python Code’s Performance

How to detect, understand, and eliminate bottlenecks in Python for a 1500x speed increase

What is the difference between UNION and JOIN in SQL?

5 minute guide to UNION, EXCEPT and INTERSECT in SQL

Python Quirks: Understand How a Variable Can Be Modified by a Function That Doesn’t Return Anything

A deep dive into how Python passes arguments and mutability to prevent unexpected bugs

The easiest way to UPSERT with SQLAlchemy

One command to both INSERT new data and UPDATE existing records in your database

Python args, kwargs, and All Other Ways to Pass Arguments to Your Function

Expertly design your function parameters in 6 examples

Create a Python Package with Super- Fast Rust Code in 3 Steps

Extend you Python code with a package containing Rust code for a >150x performance increase!

Args vs kwargs: which is the fastest way to call a function in Python?

A clear demonstration of the timeit module

Thread Your Python Program with Two Lines of Code

Speed up your program by doing multiple things simultaneously

Coding a Home Intruder System / Motion Detector with Python

Learn how to detect motion, process and analyze images by coding your own security camera

Why and how custom exceptions lead to cleaner, better code

Clean up your code by creating your own custom exceptions

No Need to Ever Write SQL Again: SQLAlchemy’s ORM for Absolute Beginners

With this ORM you can create a table, insert, read, delete and update data without writing a single line of SQL

SQLAlchemy for absolute beginners

Creating a database engine and execute SQL from Python

Run Code after Your Program Exits with Python’s AtExit

Register cleanup functions that run after your script ends or errors

Applying Python multiprocessing in 2 lines of code

When and how to use multiple cores to execute many times faster

How to Make a Database Connection in Python for Absolute Beginners

3 steps (+examples) to connect to MS SQL Server, MySQL, Oracle and many other databases