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

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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-class-init-method	Python Class Init Method	Programming_Language	draft	conceptual		__init__() constructor 파이썬 초기화 메서드		B	0.9	2026-07-04	2026-07-04			python programming w3schools init constructor	https://www.w3schools.com/python/python_class_init.asp

Python Class Init Method

🎯 한 줄 통찰 (One-line insight)

__init__() runs automatically every time a class creates a new object, replacing the need to manually set properties one by one after instantiation. [S1]

🧠 핵심 개념 (Core concepts)

• __init__() — a built-in method automatically executed when a class is instantiated. [S1]
• Purpose — assigns values to object properties or performs setup operations. [S1]
• Without __init__() — properties must be set manually on each object after creation. [S1]
• Default parameter values — def __init__(self, name, age=18): — parameters can have defaults, same as regular functions. [S1]
• Multiple parameters — __init__() can take as many parameters as needed. [S1]

📖 세부 내용 (Details)

• Basic init: class Person: def __init__(self, name, age): self.name = name; self.age = age; p1 = Person("Emil", 36). [S1]
• Manual setup without init: class Person: pass; p1 = Person(); p1.name = "Tobias"; p1.age = 25. [S1]
• Default value: def __init__(self, name, age=18): ...; p1 = Person("Emil") → age defaults to 18. [S1]
• Multiple parameters: def __init__(self, name, age, city, country): .... [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — Inheritance 챕터에서 자식 클래스가 __init__()을 재정의하거나 super().__init__()으로 부모 초기화를 호출하는 패턴으로 확장된다. [S1]

💻 코드 패턴 (Code patterns)

Init with a default parameter value (Python):

class Person:
    def __init__(self, name, age=18):
        self.name = name
        self.age = age

p1 = Person("Emil")       # age defaults to 18
p2 = Person("Tobias", 25)

✅ 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 Classes, Python Class Self Parameter, Python Inheritance
• 참조 맥락: 객체 생성 시 자동 실행되는 초기화 메서드 — Inheritance에서 super().init()으로 재사용된다.

📚 출처 (Sources)

• [S1] W3Schools — Python init() Method — https://www.w3schools.com/python/python_class_init.asp

📝 변경 이력 (Change history)

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