---
id: python-match
title: "Python Match"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["match statement", "structural pattern matching", "파이썬 매치 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", "match", "switch"]
raw_sources: ["https://www.w3schools.com/python/python_match.asp"]
applied_in: []
github_commit: ""
---

# [[Python Match]]

## 🎯 한 줄 통찰 (One-line insight)
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]

## 🧠 핵심 개념 (Core concepts)
- **`match` statement** — replaces long if/elif chains; selects one of many code blocks. [S1]
- **Syntax** — `match expression: case x: ... case y: ... case z: ...`. [S1]
- **Evaluation** — the expression is evaluated once, then compared against each case in order. [S1]
- **`_` default case** — matches anything; must be placed LAST to act as a true default (since it always matches). [S1]
- **`|` combine values** — `case 1 | 2 | 3:` matches any of the listed values in one case. [S1]
- **`if` guard** — `case 1 | 2 | 3 if month == 4:` adds an extra condition to a case. [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **`_` must be last** — since `_` always matches, placing it before other cases would make those cases unreachable — its position enforces its role as fallback. [S1]

## 📖 세부 내용 (Details)
- Basic match: `match day: case 1: print("Monday") ... case 7: print("Sunday")`. [S1]
- Default case: `match day: case 6: ... case 7: ... case _: print("Looking forward to the Weekend")`. [S1]
- Combined values: `case 1 | 2 | 3 | 4 | 5: print("Today is a weekday")`. [S1]
- Guarded case: `case 1 | 2 | 3 | 4 | 5 if month == 4: print("A weekday in April")`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 요일/상태 판별처럼 elif 체인이 길어질 상황에서 대안으로 쓰인다. [S1]

## 💻 코드 패턴 (Code patterns)
Combined values with a default case (Python):
```python
match day:
    case 1 | 2 | 3 | 4 | 5:
        print("Today is a weekday")
    case 6 | 7:
        print("I love weekends!")
    case _:
        print("Unknown day")
```

## ✅ 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 Elif]], [[Python If Statement]]
- **참조 맥락:** elif 체인이 길어질 때의 대안 — 다른 언어의 switch 문에 대응.

## 📚 출처 (Sources)
- [S1] W3Schools — Python Match — https://www.w3schools.com/python/python_match.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "Python Match" page (Astra wiki-curation, P-Reinforce v3.1 format).