2nd/10_Wiki/Dev/Topic_Python/Python_Match.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
python-match	Python Match	Programming_Language	draft	conceptual		match statement structural pattern matching 파이썬 매치 문		B	0.88	2026-07-04	2026-07-04			python programming w3schools match switch	https://www.w3schools.com/python/python_match.asp

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):

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).