f41c22d0ac
- CLAUDE.md: add "Question the question" and "One clarifying question" rules to Tone and Interaction — XY problem detection, false premise checks, and explicit reframe pattern before answering - Add claude/ detail-file directory (topic docs referenced from CLAUDE.md) - Add ABOUT.md, FUTURE.md - Update memory/, scripts/, settings.yaml with accumulated session changes Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
8 lines
657 B
Markdown
8 lines
657 B
Markdown
# Python Gotchas
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## `sys.exit()` inside bare `except: pass` is swallowed
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**Symptom:** A loop that should terminate on first match with `sys.exit(0)` kept iterating and printing multiple lines.
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**Cause:** `sys.exit()` raises `SystemExit`, which is a `BaseException`. A bare `except:` (or `except Exception:`) inside the loop body catches it and continues iteration.
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**Fix:** Use `break` instead of `sys.exit()` when the exit is inside an exception handler, or narrow the except clause to the specific exception you care about (e.g., `except (KeyError, ValueError):`). Never use bare `except:` — it masks `SystemExit`, `KeyboardInterrupt`, and real bugs.
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