Buglyst Blog
Learn to debug under pressure.
Playbooks for fast pattern recognition, guides for the full investigation, and articles for the engineering judgment around the edges.
17 playbooks · 509 guides · 95 articles · 12 linked practice labs ·skip to practice
Fast pattern recognition for the production failures engineers see most often.
1 playbook in Languages & Runtime
Structured investigations for the failure modes engineers meet in real systems.
Debugging Mutable Default Arguments in Python Dataclasses
A practical guide to identifying and fixing the mutable default argument bug in Python dataclasses, with real-world debugging steps and a production war story.
NumPy Broadcasting Shape Mismatch: A Field Guide to Silent Failures and Runtime Errors
Diagnose and fix NumPy broadcasting shape mismatches with concrete steps, error patterns, and a real incident walkthrough.
Debugging Python Datetime Timezone-Awareness and Offset Errors
A concise guide to diagnosing and fixing Python datetime offset and timezone-awareness bugs, with real-world examples and concrete commands.
Python Virtual Environment Package Not Found: Debugging Guide
A practical guide to debugging 'module not found' errors inside Python virtual environments, covering PATH issues, activation traps, and pip installation nuances.
Python UnicodeEncodeError / UnicodeDecodeError: A Field Guide
Diagnose and fix Python Unicode encoding/decoding errors in production. Covers common causes, quick checks, and real-world fixes.
Python Generator Already Exhausted: What You're Actually Seeing
A direct engineering guide to diagnosing, fixing, and preventing the 'StopIteration' or silent empty-iteration caused by exhausted Python generators.
Long-form thinking on debugging habits, observability, and the systems around the bug.