Python Variable Scopes: Understanding Local, Global, and Nonlocal

A simple description of all variable scopes in Python.

Parameterized Decorators

Class-based parameterized decorators look better than function-based ones because they reduce the number of nested function layers.

Union Operators To dict

A new way to merge two dictionaries in Python 3.9.

Generator Expressions

Sometimes creating a list in Python can be harmful, and it's better to use Generator Expressions.