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79 lines
3.4 KiB
Markdown
79 lines
3.4 KiB
Markdown
---
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id: python-match
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title: "Python Match"
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category: "Programming_Language"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["match statement", "structural pattern matching", "파이썬 매치 문"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["python", "programming", "w3schools", "match", "switch"]
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raw_sources: ["https://www.w3schools.com/python/python_match.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[Python Match]]
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## 🎯 한 줄 통찰 (One-line insight)
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match (Python's switch-like statement) selects one block by comparing a value against each `case`, with `_` as a catch-all default, `|` to combine multiple values in one case, and an optional `if` guard for extra conditions. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **`match` statement** — replaces long if/elif chains; selects one of many code blocks. [S1]
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- **Syntax** — `match expression: case x: ... case y: ... case z: ...`. [S1]
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- **Evaluation** — the expression is evaluated once, then compared against each case in order. [S1]
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- **`_` default case** — matches anything; must be placed LAST to act as a true default (since it always matches). [S1]
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- **`|` combine values** — `case 1 | 2 | 3:` matches any of the listed values in one case. [S1]
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- **`if` guard** — `case 1 | 2 | 3 if month == 4:` adds an extra condition to a case. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **`_` must be last** — since `_` always matches, placing it before other cases would make those cases unreachable — its position enforces its role as fallback. [S1]
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## 📖 세부 내용 (Details)
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- Basic match: `match day: case 1: print("Monday") ... case 7: print("Sunday")`. [S1]
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- Default case: `match day: case 6: ... case 7: ... case _: print("Looking forward to the Weekend")`. [S1]
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- Combined values: `case 1 | 2 | 3 | 4 | 5: print("Today is a weekday")`. [S1]
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- Guarded case: `case 1 | 2 | 3 | 4 | 5 if month == 4: print("A weekday in April")`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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소스에서 모순되는 정보는 발견되지 않음.
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — 요일/상태 판별처럼 elif 체인이 길어질 상황에서 대안으로 쓰인다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Combined values with a default case (Python):
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```python
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match day:
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case 1 | 2 | 3 | 4 | 5:
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print("Today is a weekday")
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case 6 | 7:
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print("I love weekends!")
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case _:
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print("Unknown day")
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[Python Tutorial]]
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- **관련 개념:** [[Python Elif]], [[Python If Statement]]
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- **참조 맥락:** elif 체인이 길어질 때의 대안 — 다른 언어의 switch 문에 대응.
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## 📚 출처 (Sources)
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- [S1] W3Schools — Python Match — https://www.w3schools.com/python/python_match.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "Python Match" page (Astra wiki-curation, P-Reinforce v3.1 format).
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