Tag: posix

3 articles.

Posix In Python Learning Series (Part 3)

Jan 23, 2026 • Cliff

In this article, we explore a subtle bug encountered while implementing a multi-file grep command in Python. The issue revolved around incorrect line number tracking across multiple files. We...

Posix In Python Learning Series (Part 2)

Jan 22, 2026 • Cliff

In this tutorial, we extend our grep command with new features using Test-Driven Development (TDD). We add options for printing filenames, line numbers, quiet mode, and listing files with matches,...

Posix In Python Learning Series (Part 1)

Jan 16, 2026 • Cliff

A step-by-step tutorial on building a tiny grep command in Python, covering argument parsing, regex compilation, file handling, and testing.