Meet the Walrus Operator (:=) in Python
The Python Walrus Operator (:=) lets you assign a value inside an expression. It reduces repetition, speeds up common patterns (loops, filtering, regex), and keeps code tidy—when used thoughtfully.
Python’s sitecustomize.py & usercustomize.py — The Hidden Startup Files You Didn’t Know About
Every time you start Python, two special files might run — without you typing a single command.
They’re called sitecustomize.py and usercustomize.py, and they can be game-changers for global configuration… or a nightmare if misused.
Python __init__.py: The Tiny File That Turns a Folder into a Package
__init__.py is the switch that tells Python, “this folder is a package.” Learn what it does, when it can be empty, how to control imports with __all__, and why it still matters even with namespace packages in Python 3.3+.