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Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

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2026-07-05 00:39:13 +09:00

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title

Python Dictionaries

🎯 한 줄 통찰 (One-line insight)

A dictionary stores key:value pairs — ordered since Python 3.7, changeable, no duplicate keys — and assigning to an existing key silently OVERWRITES it rather than raising an error or creating a duplicate. [S1]

🧠 핵심 개념 (Core concepts)

Dictionary — stores data in key:value pairs; one of 4 built-in collection types. [S1]
Ordered (3.7+) — item order is defined and persists; prior to 3.7, dictionaries were unordered. [S1]
Changeable — items can be changed, added, removed after creation. [S1]
No duplicate keys — repeating a key in a literal overwrites the earlier value. [S1]
dict() constructor — alternative creation syntax: dict(name="John", age=36). [S1]

🧩 추출된 패턴 (Extracted patterns)

Silent overwrite on duplicate key — {"year": 1964, "year": 2020} doesn't error or keep both; the later value simply wins — a subtle footgun if a dict literal is built programmatically with accidental key collisions. [S1]

📖 세부 내용 (Details)

Basic creation: thisdict = {"brand": "Ford", "model": "Mustang", "year": 1964}. [S1]
Access by key: print(thisdict["brand"]). [S1]
Duplicate key overwrite: {"year": 1964, "year": 2020} → keeps only 2020. [S1]
Mixed value types: {"brand": "Ford", "electric": False, "year": 1964, "colors": ["red","white","blue"]}. [S1]
Constructor: thisdict = dict(name="John", age=36, country="Norway"). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

순서 보장은 버전 종속적: Python 3.7+부터 순서 보장, 이전 버전은 무순서. [S1]

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 이후 Access/Change/Add/Remove/Loop/Copy/Nested/Methods 챕터의 기초 개론이다. [S1]

💻 코드 패턴 (Code patterns)

Basic dictionary creation and access (Python):

thisdict = {"brand": "Ford", "model": "Mustang", "year": 1964}
print(thisdict["brand"])

✅ 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 Lists, Python Sets, Python Dictionaries Access
참조 맥락: 4대 컬렉션 타입 중 이름-값 매핑이 필요할 때 사용하는 타입.

📚 출처 (Sources)

[S1] W3Schools — Python Dictionaries — https://www.w3schools.com/python/python_dictionaries.asp

📝 변경 이력 (Change history)

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

3.4 KiB Raw Blame History