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Functions in Python: Parameters, Return Values, and Scope
TLDR: Python functions are first-class objects, not just reusable blocks. They support keyword arguments, safe defaults with None, variadic *args/**kwargs, closures, and LEGB scope resolution. These f
•22 min read
Python Data Structures: Lists, Dicts, Sets, and Tuples
TLDR: Python's four built-in collections are not interchangeable — their internals are fundamentally different. list is a dynamic array: fast at the end, slow for membership. dict is a hash table: O(1
•26 min read
Python Basics: Variables, Types, and Control Flow
TLDR: Python variables are labels that point at objects — not typed boxes. The type lives with the object, not the variable. Master truthiness, f-strings, for/while loops, and the handful of pitfalls
•22 min read