---
id: python-json
title: "Python JSON"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["json.loads", "json.dumps", "파이썬 제이슨"]
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", "json"]
raw_sources: ["https://www.w3schools.com/python/python_json.asp"]
applied_in: []
github_commit: ""
---

# [[Python JSON]]

## 🎯 한 줄 통찰 (One-line insight)
`json.loads()` parses a JSON string into a Python dict, `json.dumps()` does the reverse — and the type mapping isn't 1:1: both Python `list` and `tuple` collapse to a JSON `Array`, since JSON has no separate concept of an immutable sequence. [S1]

## 🧠 핵심 개념 (Core concepts)
- **`json` module** — Python's built-in package for working with JSON data. [S1]
- **`json.loads(string)`** — parses a JSON string into a Python dictionary. [S1]
- **`json.dumps(obj)`** — converts a Python object into a JSON string. [S1]
- **Convertible Python types** — dict, list, tuple, string, int, float, True, False, None. [S1]
- **Type mapping (Python → JSON)** — dict→Object, list→Array, tuple→Array, str→String, int/float→Number, True/False→true/false, None→null. [S1]
- **Formatting parameters** — `indent` (pretty-print spacing), `separators` (custom item/key separators), `sort_keys` (order keys alphabetically). [S1]

## 🧩 추출된 패턴 (Extracted patterns)
- **list and tuple both become Array** — the type mapping table shows JSON has no equivalent of Python's mutable/immutable sequence distinction, so information about "was this a tuple or a list" is lost on serialization. [S1]

## 📖 세부 내용 (Details)
- Parse JSON: `x = '{ "name":"John", "age":30 }'; y = json.loads(x); print(y["age"])`. [S1]
- Serialize to JSON: `x = {"name": "John", "age": 30}; y = json.dumps(x)`. [S1]
- Pretty-print: `json.dumps(x, indent=4)`. [S1]
- Custom separators: `json.dumps(x, indent=4, separators=(". ", " = "))`. [S1]
- Sorted keys: `json.dumps(x, indent=4, sort_keys=True)`. [S1]

## ⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음. list/tuple이 모두 Array로 변환된다는 점이 표에서 명시적으로 드러남. [S1]

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — Python Dictionaries Nested 챕터의 중첩 구조가 JSON 직렬화의 자연스러운 대상이다. [S1]

## 💻 코드 패턴 (Code patterns)
Round-trip parse and serialize (Python):
```python
import json
x = '{ "name":"John", "age":30, "city":"New York"}'
y = json.loads(x)
print(y["age"])

z = json.dumps(y, indent=4, sort_keys=True)
print(z)
```

## ✅ 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 Dictionaries Nested]], [[Python Modules]], [[JSON]]
- **참조 맥락:** 데이터 교환 포맷의 표준 도구 — 중첩 딕셔너리와 자연스럽게 결합된다.

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

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