fix(data-science): make _safe_pyplot_savefig CJK/race-tolerant (S-E)#11
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S-E 한국어 라벨 시나리오에서 plt.savefig(artifact_path("..."))가 cwd가
정확히 artifact_dir인데도 silently 파일을 만들지 않던 회귀 해결.
Fix:
- bbox_inches='tight' 자동 주입 — CJK 라벨이 canvas 밖으로 잘리거나
stale figure가 invalid metric을 가질 때 발생하는 zero-byte 출력 차단
- savefig 호출 후 파일이 만들어지지 않았으면 canvas.draw() 강제 후
1회 재호출 — figure manager state leak으로 인한 silent no-op 복구
E2E (dong, playwright) — S-E korean_sales.csv 한국어 라벨:
- 이전: stdout saved + exists False, generated_files []
- 이후: korean_sales_by_region.png 정상 등록 + 다운로드
pytest 316/316 PASS, 회귀 0.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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This was referenced May 21, 2026
This was referenced May 22, 2026
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Summary
S-E 한국어 라벨 시나리오에서 `plt.savefig` 호출 후 파일이 silently 안 만들어지던 follow-up 회귀 fix.
Root Cause
backend container 직접 simulate에서는 정상 작동 → multi-turn dong 계정의 누적 matplotlib state가 CJK 라벨 + tight_layout 조합에서 zero-byte 또는 silent no-op 만듦.
Fix
Verification
🤖 Generated with Claude Code