---
id: python-lists-loop
title: "Python Lists Loop"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["Loop Lists", "파이썬 리스트 반복"]
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", "lists", "loop"]
raw_sources: ["https://www.w3schools.com/python/python_lists_loop.asp"]
applied_in: []
github_commit: ""
---

# [[Python Lists Loop]]

## 🎯 한 줄 통찰 (One-line insight)
A list can be looped four ways — direct for-in, index-based via range(len(...)), a while loop with a manual counter, or a one-line list comprehension — each trading off simplicity against index access. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Direct for loop** — `for x in thislist: print(x)` — simplest, but no index access. [S1]
- **Index-based for loop** — `for i in range(len(thislist)): print(thislist[i])` — gives index access. [S1]
- **While loop** — manual counter incremented each iteration, same effect as index-based for. [S1]
- **List comprehension as loop shorthand** — `[print(x) for x in thislist]` is the shortest syntax for a simple per-item action. [S1]

## 📖 세부 내용 (Details)
- Direct loop: `for x in thislist: print(x)`. [S1]
- Index-based loop: `for i in range(len(thislist)): print(thislist[i])`. [S1]
- While loop: `i = 0; while i < len(thislist): print(thislist[i]); i = i + 1`. [S1]
- Comprehension-as-loop: `[print(x) for x in thislist]`. [S1]

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

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 다음 챕터 List Comprehension에서 리스트 컴프리헨션이 "새 리스트 생성" 목적으로 본격 확장된다. [S1]

## 💻 코드 패턴 (Code patterns)
Index-based loop (Python):
```python
thislist = ["apple", "banana", "cherry"]
for i in range(len(thislist)):
    print(thislist[i])
```

## ✅ 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 For Loops]], [[Python While Loops]], [[Python Lists Comprehension]]
- **참조 맥락:** 리스트 순회의 4가지 방법 — List Comprehension 챕터에서 새 리스트 생성용으로 심화.

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

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