Regular Expressions in Python, Part 1: Syntax, Functions, Flags
Regular expressions in Python from the ground up: raw strings, core syntax, match vs search vs fullmatch, flags, and five mistakes that silently break patterns.
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Advanced Python Regex: Groups, Lookarounds and Substitution (Part 2)
Advanced Python regex with tested output: named groups, lookarounds, re.sub with a function, and why a 24-character input made (a+)+$ run for 10 seconds.
Python Strings: F-Strings, Methods and the strip() Trap
Python strings in practice: f-strings, slicing, the methods worth memorising, why += loops slow down, and the encoding default that breaks scripts on Windows.
Git and GitHub Tutorial: Install Git and Push to a Remote Repository
A Git and GitHub tutorial for beginners: install Git, sign in with SSH or a token (GitHub rejects passwords), write .gitignore, push, and undo mistakes.