2nd/10_Wiki/Dev/Topic_Python/Python_Frozenset.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-frozenset	Python Frozenset	Programming_Language	draft	conceptual		frozenset() 파이썬 프로즌셋		B	0.88	2026-07-04	2026-07-04			python programming w3schools frozenset	https://www.w3schools.com/python/python_frozenset.asp

Python Frozenset

🎯 한 줄 통찰 (One-line insight)

frozenset is a set that can never be modified after creation — no add/remove exists — but it still supports every non-mutating set operation (union, intersection, difference, subset/superset checks). [S1]

🧠 핵심 개념 (Core concepts)

• frozenset — an immutable version of a set; unique, unordered, unchangeable elements. [S1]
• No mutation methods — elements cannot be added or removed after creation. [S1]
• All non-mutating set operations still work — copy(), difference(), intersection() (&), isdisjoint(), issubset() (<=/<), issuperset() (>=/>), symmetric_difference() (^), union() (|). [S1]
• Creation — frozenset() constructor from any iterable. [S1]

📖 세부 내용 (Details)

• Create and check type: x = frozenset({"apple", "banana", "cherry"}); print(type(x)). [S1]
• All frozenset operations mirror set operations but return a new frozenset instead of a set. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 딕셔너리 키나 다른 셋의 원소로 써야 하는 등 해시 가능(hashable)한 셋이 필요할 때 사용된다(불변이므로 해시 가능). [S1]

💻 코드 패턴 (Code patterns)

Create and inspect a frozenset (Python):

x = frozenset({"apple", "banana", "cherry"})
print(type(x))  # <class 'frozenset'>

✅ 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 Sets, Python Sets Join, Python Tuples
• 참조 맥락: Set의 불변 버전 — Tuple이 List의 불변 버전인 것과 대칭 관계.

📚 출처 (Sources)

• [S1] W3Schools — Python frozenset — https://www.w3schools.com/python/python_frozenset.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "Python frozenset" page (Astra wiki-curation, P-Reinforce v3.1 format).