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10_Wiki/Dev/Topic_Python/Python_Tuples.md

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+---
+id: python-tuples
+title: "Python Tuples"
+category: "Programming_Language"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["파이썬 튜플"]
+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", "tuples"]
+raw_sources: ["https://www.w3schools.com/python/python_tuples.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[Python Tuples]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+A tuple is an ordered, immutable, duplicate-allowing collection written with round brackets — and a single-item tuple requires a trailing comma, or Python won't recognize it as a tuple at all. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **Tuple** — one of Python's 4 built-in collection types; ordered and unchangeable, written with `()`. [S1]
+- **Ordered** — item order is fixed and persists. [S1]
+- **Unchangeable (immutable)** — cannot change, add, or remove items after creation. [S1]
+- **Allows duplicates** — indexed, so identical values can repeat. [S1]
+- **Single-item tuple gotcha** — `("apple",)` is a tuple; `("apple")` (no comma) is just a string in parentheses. [S1]
+- **`tuple()` constructor** — alternative creation syntax. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Trailing-comma requirement** — the single most common tuple mistake is omitting the comma for a one-item tuple, silently producing a non-tuple instead of raising an error. [S1]
+
+## 📖 세부 내용 (Details)
+- Basic creation: `thistuple = ("apple", "banana", "cherry")`. [S1]
+- Duplicates allowed: `thistuple = ("apple", "banana", "cherry", "apple", "cherry")`. [S1]
+- Single-item tuple: `thistuple = ("apple",)  # tuple` vs `thistuple = ("apple")  # NOT a tuple`. [S1]
+- Constructor: `thistuple = tuple(("apple", "banana", "cherry"))`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — List와 대비되는 불변 컬렉션으로서 이후 Access/Update/Unpack/Loop/Join/Methods 챕터의 기초가 된다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Single-item tuple gotcha (Python):
+```python
+thistuple = ("apple",)   # a tuple
+print(type(thistuple))   # <class 'tuple'>
+
+thistuple = ("apple")    # NOT a tuple
+print(type(thistuple))   # <class 'str'>
+```
+
+## ✅ 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]], [[Python Tuples Update]], [[Python Tuples Unpack]]
+- **참조 맥락:** List의 불변 버전 — Set/Dictionary와 함께 4대 컬렉션 타입 중 하나.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — Python Tuples — https://www.w3schools.com/python/python_tuples.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "Python Tuples" page (Astra wiki-curation, P-Reinforce v3.1 format).