2nd/10_Wiki/Dev/Topic_Python/Python_Polymorphism.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-polymorphism	Python Polymorphism	Programming_Language	draft	conceptual		method overriding 파이썬 다형성		B	0.9	2026-07-04	2026-07-04			python programming w3schools polymorphism inheritance	https://www.w3schools.com/python/python_polymorphism.asp

Python Polymorphism

🎯 한 줄 통찰 (One-line insight)

Polymorphism lets one for-loop call .move() on Car, Boat, and Plane objects uniformly — and combined with inheritance, a child class can inherit a method wholesale (Car) or override it entirely (Boat, Plane) while still fitting the same interface. [S1]

🧠 핵심 개념 (Core concepts)

• Polymorphism — "many forms"; methods/functions/operators with the same name executable on many different objects/classes. [S1]
• Function polymorphism — a single function like len() behaves appropriately across different types (string length, tuple item count, dict key-value pair count). [S1]
• Class polymorphism — unrelated classes (Car, Boat, Plane) each define their own move(); calling .move() in a loop over mixed objects "just works" for each type. [S1]
• Inheritance + polymorphism — child classes of a common parent can either inherit the parent's method unchanged (Car) or override it with their own version (Boat, Plane). [S1]

🧩 추출된 패턴 (Extracted patterns)

• Uniform iteration over mixed types — for x in (car1, boat1, plane1): x.move() works regardless of each object's actual class, because polymorphism guarantees .move() exists on all of them with the same call signature. [S1]

📖 세부 내용 (Details)

• len() across types: len("Hello World!"), len(("apple","banana","cherry")), len({"brand":"Ford",...}) — same function, different behavior per type. [S1]
• Unrelated classes sharing a method name: Car, Boat, Plane each define move() independently. [S1]
• Inheritance-based polymorphism: Vehicle parent defines move(); Car inherits it unchanged (pass), Boat/Plane override it with their own version. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 공통 인터페이스를 가진 서로 다른 객체를 동일한 코드로 다뤄야 할 때(예: 도형 넓이 계산) 표준적으로 쓰인다. [S1]

💻 코드 패턴 (Code patterns)

Uniform call over heterogeneous objects (Python):

class Vehicle:
    def move(self): print("Move!")
class Car(Vehicle): pass
class Boat(Vehicle):
    def move(self): print("Sail!")
class Plane(Vehicle):
    def move(self): print("Fly!")

for x in (Car("Ford","Mustang"), Boat("Ibiza","Touring 20"), Plane("Boeing","747")):
    x.move()

✅ 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 Inheritance, Python Class Methods
• 참조 맥락: 공통 인터페이스를 가진 이종 객체를 동일하게 다룰 때 사용 — Inheritance와 결합해 메서드 오버라이드로 확장.

📚 출처 (Sources)

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

📝 변경 이력 (Change history)

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