---
id: python-dictionaries-copy
title: "Python Dictionaries Copy"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["Copy Dictionaries", "파이썬 딕셔너리 복사"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.9
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["python", "programming", "w3schools", "dictionaries", "copy", "reference"]
raw_sources: ["https://www.w3schools.com/python/python_dictionaries_copy.asp"]
applied_in: []
github_commit: ""
---

# [[Python Dictionaries Copy]]

## 🎯 한 줄 통찰 (One-line insight)
`dict2 = dict1` creates a reference, not a copy — exactly the same footgun as lists — so `copy()` or `dict()` must be used to get a truly independent dictionary. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Reference trap** — `dict2 = dict1` makes `dict2` reference `dict1`; changes to one affect both. [S1]
- **`copy()` method** — `mydict = thisdict.copy()` makes an independent copy. [S1]
- **`dict()` constructor** — `mydict = dict(thisdict)` is an alternative copy method. [S1]

## 📖 세부 내용 (Details)
- Copy via method: `mydict = thisdict.copy()`. [S1]
- Copy via constructor: `mydict = dict(thisdict)`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — Python Lists Copy 챕터와 동일한 참조/복사 함정을 딕셔너리에도 그대로 적용해야 한다. [S1]

## 💻 코드 패턴 (Code patterns)
Independent copy via copy() (Python):
```python
thisdict = {"brand": "Ford", "model": "Mustang", "year": 1964}
mydict = thisdict.copy()
```

## ✅ 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 Copy]], [[Python Dictionaries]]
- **참조 맥락:** 리스트와 동일한 참조 vs 복사 함정 — 딕셔너리에도 그대로 적용.

## 📚 출처 (Sources)
- [S1] W3Schools — Python - Copy Dictionaries — https://www.w3schools.com/python/python_dictionaries_copy.asp

## 📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "Python - Copy Dictionaries" page (Astra wiki-curation, P-Reinforce v3.1 format).