---
id: python-strings
title: "Python Strings"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["파이썬 문자열"]
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", "strings"]
raw_sources: ["https://www.w3schools.com/python/python_strings.asp"]
applied_in: []
github_commit: ""
---

# [[Python Strings]]

## 🎯 한 줄 통찰 (One-line insight)
Python strings are arrays of Unicode characters with no separate character type — a single character is just a length-1 string — so indexing, looping, `len()`, and membership tests (`in`/`not in`) all work directly on them. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Quote flexibility** — single and double quotes are interchangeable; nested quotes must differ from the surrounding quote style. [S1]
- **Multiline strings** — triple double/single quotes preserve embedded line breaks. [S1]
- **Strings are arrays** — Unicode character arrays; no dedicated char type. [S1]
- **Indexing** — `a[1]` accesses the character at position 1 (0-indexed). [S1]
- **Looping** — `for x in "banana": print(x)` iterates characters. [S1]
- **`len()`** — returns string length. [S1]
- **`in` / `not in`** — membership test for a substring. [S1]

## 📖 세부 내용 (Details)
- Quotes inside quotes: `print("He is called 'Johnny'")`. [S1]
- Multiline string: `a = """Lorem ipsum...multiple lines..."""`. [S1]
- Indexing: `a = "Hello, World!"; print(a[1])`. [S1]
- Length: `print(len(a))`. [S1]
- Membership: `print("free" in txt)`, `print("expensive" not in txt)`. [S1]

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

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — 문자열이 배열이라는 성질은 Slicing/Modify/Methods 챕터 전체의 전제가 된다. [S1]

## 💻 코드 패턴 (Code patterns)
Membership test inside an if statement (Python):
```python
txt = "The best things in life are free!"
if "free" in txt:
    print("Yes, 'free' is present.")
```

## ✅ 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 Strings Slicing]], [[Python Strings Modify]], [[Python For Loops]]
- **참조 맥락:** 문자열이 문자 배열이라는 핵심 성질을 정의 — 슬라이싱/메서드 챕터의 기초.

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

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