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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 · 176 Learning notes · 25 Practice · 1

Coding tips

AttributeError: 'NoneType' object has no attribute in Python: 10 Causes and Fixes, from sort() and re.match to dict.get (Tested Examples)

Python raises AttributeError: 'NoneType' object has no attribute when a variable you expected to hold an object holds None instead. Here are 10 real causes, from list.sort() and functions without return to re.match and dict.get, with tested output and the fix for each.

November 9, 2026 · 9 min read · 0 views