Indexing

Security notes, SOC lab write-ups and tested code by Mahir Faysal, a SOC Level 1 cybersecurity learner in Bangladesh, plus notes from my Next.js and Gemini projects. Sample posts are marked and drafts stay in the admin area.

All notes Coding tips · 166 Learning notes · 25 Practice · 1

Coding tips

IndexError: list index out of range in Python: 10 Causes and Fixes (Tested Examples)

Python raises IndexError: list index out of range when you ask for a position that does not exist. Here are 10 real causes, from an empty list and off-by-one bugs to mutating while iterating, with the exact tracebacks from my tests and the fixes that stop the crash.

November 7, 2026 · 11 min read · 11 views