2nd/10_Wiki/Dev/Topic_Python/Python_Operators_Identity.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-operators-identity	Python Operators Identity	Programming_Language	draft	conceptual		is operator is not operator 파이썬 식별 연산자		B	0.9	2026-07-04	2026-07-04			python programming w3schools operators identity	https://www.w3schools.com/python/python_operators_identity.asp

Python Operators Identity

🎯 한 줄 통찰 (One-line insight)

is checks whether two variables reference the exact same object in memory, while == checks whether their values are equal — two equal-valued lists can still be is not the same object. [S1]

🧠 핵심 개념 (Core concepts)

• is — True if both variables are the same object (same memory location). [S1]
• is not — True if both variables are NOT the same object. [S1]
• is vs == — is checks identity (same object), == checks value equality. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Equal-but-not-identical — two separately created lists with identical contents are == True but is False, since they occupy different memory locations; only an alias (z = x) is is True with the original. [S1]

📖 세부 내용 (Details)

• Same object vs. equal value: [S1]

x = ["apple", "banana"]
y = ["apple", "banana"]
z = x
print(x is z)   # True (same object)
print(x is y)   # False (different objects)
print(x == y)   # True (equal values)

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — is None 체크처럼, 값이 아닌 정확한 객체 동일성을 확인해야 할 때 사용된다. [S1]

💻 코드 패턴 (Code patterns)

is vs == distinction (Python):

x = [1, 2, 3]
y = [1, 2, 3]
print(x == y)  # True  (equal values)
print(x is y)  # False (different objects)

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.90
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: Python Tutorial
• 관련 개념: Python Operators Comparison, Python None
• 참조 맥락: 값이 아닌 객체 동일성을 확인해야 할 때 사용 — is None 체크의 근거.

📚 출처 (Sources)

• [S1] W3Schools — Python Identity Operators — https://www.w3schools.com/python/python_operators_identity.asp

📝 변경 이력 (Change history)

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