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10_Wiki/Dev/Topic_Python/Python_Pass_Statement.md

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+---
+id: python-pass-statement
+title: "Python Pass Statement"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["pass keyword", "파이썬 pass 문"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.88
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["python", "programming", "w3schools", "pass"]
+raw_sources: ["https://www.w3schools.com/python/python_if_pass.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Python Pass Statement]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+Python cannot have a truly empty code block — a comment alone raises an IndentationError — so `pass` exists as an actual (no-op) statement that satisfies the syntax requirement while doing nothing. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **`pass`** — a null operation; nothing happens when it executes; a placeholder. [S1]
+- **Why needed** — if/for/function/class blocks cannot be syntactically empty in Python. [S1]
+- **Common uses** — sketching structure before implementing logic, satisfying syntax when no action is needed, placeholders during development, empty functions/classes planned for later. [S1]
+- **`pass` vs. comments** — a comment is ignored entirely by Python and does NOT satisfy the "block needs a statement" requirement; `pass` does. [S1]
+- **Works in other contexts too** — loops, functions, classes, not just if statements. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Comment-only block is a common beginner error** — `if score > 90: # comment` with no actual statement raises `IndentationError`, since comments aren't statements — `pass` is the fix. [S1]
+
+## 📖 세부 내용 (Details)
+- Basic pass: `if b > a: pass`. [S1]
+- Comment-only block fails: `if score > 90: # This is excellent` alone raises IndentationError. [S1]
+- Fixed with pass: `if score > 90: pass # This is excellent`. [S1]
+- In a function stub: `def calculate_discount(price): pass  # TODO: Implement discount logic`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 함수/클래스의 스텁(stub) 구현에 표준적으로 쓰이는 패턴이다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+pass as a function stub placeholder (Python):
+```python
+def calculate_discount(price):
+    pass  # TODO: Implement discount logic
+```
+
+## ✅ 검증 상태 및 신뢰도
+- **상태:** draft
+- **검증 단계:** conceptual
+- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
+- **신뢰 점수:** 0.88
+- **중복 검사 결과:** 신규 생성 (New discovery)
+
+## 🔗 지식 그래프 (Knowledge Graph)
+- **상위/루트:** [[Python Tutorial]]
+- **관련 개념:** [[Python If Statement]], [[Python For Loops]], [[Python Functions]]
+- **참조 맥락:** 빈 블록이 필요한 모든 곳(if/for/함수/클래스)에서 재사용되는 플레이스홀더.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Python Pass Statement — https://www.w3schools.com/python/python_if_pass.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Python Pass Statement" page (Astra wiki-curation, P-Reinforce v3.1 format).