---
id: python-dictionaries-add
title: "Python Dictionaries Add"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["Add Items", "파이썬 딕셔너리 추가"]
duplicate_of: ""
source_trust_level: "B"
confidence_score: 0.88
created_at: 2026-07-04
updated_at: 2026-07-04
review_reason: ""
merge_history: []
tags: ["python", "programming", "w3schools", "dictionaries", "add"]
raw_sources: ["https://www.w3schools.com/python/python_dictionaries_add.asp"]
applied_in: []
github_commit: ""
---

# [[Python Dictionaries Add]]

## 🎯 한 줄 통찰 (One-line insight)
Adding a new key is symmetric with changing an existing one — the same bracket-assignment and update() syntax works for both, since Python simply creates the key if it doesn't already exist. [S1]

## 🧠 핵심 개념 (Core concepts)
- **New key via assignment** — `thisdict["color"] = "red"` creates the key if absent. [S1]
- **`update()` also adds** — if the key given to `update()` doesn't exist yet, it's added rather than updated. [S1]

## 📖 세부 내용 (Details)
- Assignment-based add: `thisdict["color"] = "red"`. [S1]
- Update-based add: `thisdict.update({"color": "red"})`. [S1]

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

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — Change Dictionary Items 챕터와 문법이 완전히 동일하며, 키 존재 여부만 "수정 vs 추가"를 가른다. [S1]

## 💻 코드 패턴 (Code patterns)
Add a new key (Python):
```python
thisdict = {"brand": "Ford", "model": "Mustang", "year": 1964}
thisdict["color"] = "red"
```

## ✅ 검증 상태 및 신뢰도
- **상태:** draft
- **검증 단계:** conceptual
- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
- **신뢰 점수:** 0.88
- **중복 검사 결과:** 신규 생성 (New discovery)

## 🔗 지식 그래프 (Knowledge Graph)
- **상위/루트:** [[Python Tutorial]]
- **관련 개념:** [[Python Dictionaries Change]], [[Python Dictionaries Remove]]
- **참조 맥락:** 딕셔너리에 새 키를 추가하는 방법 — Change Dictionary Items와 동일한 문법.

## 📚 출처 (Sources)
- [S1] W3Schools — Python - Add Dictionary Items — https://www.w3schools.com/python/python_dictionaries_add.asp

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