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Python Refactor Coach

Paste any Python. Get a senior-engineer review in seconds — bugs first, then performance, idioms, readability. No signup, no lesson required.

Your code

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Your code is sent to our Lambda engine for review. Don't paste real secrets — the email/phone/card scrubber catches obvious PII before send, but it's not a replacement for keeping work credentials out of the editor.

Need a canonical implementation instead? 📚 Browse the Code Vault — token bucket, idempotency key, circuit breaker.

Daily code-review reps? 🎯 Refactor Challenge — guess the senior's top finding before the reveal. Or ⚔️ Diff Battle — accept or reject candidate refactors PR-review style.

Want the 3am-page shape instead? 🔥 Postmortem Replay — read code + scan logs + pick the root cause.

Senior review

Review will appear here.

  • Findings are ordered by severity — bugs first, then performance, production concerns, idioms, readability.
  • Each finding includes WHY it matters and a concrete suggestion you can apply.
  • Up to 8,000 characters per submission. For larger codebases, split into focused files.