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73 lines
3.3 KiB
Markdown
73 lines
3.3 KiB
Markdown
---
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id: python-sets
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title: "Python Sets"
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category: "Programming_Language"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["파이썬 셋"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.9
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["python", "programming", "w3schools", "sets"]
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raw_sources: ["https://www.w3schools.com/python/python_sets.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[Python Sets]]
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## 🎯 한 줄 통찰 (One-line insight)
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A set is Python's unordered, unindexed, no-duplicates collection — and its duplicate detection treats True/1 as the same value, and False/0 as the same value, since equality (not just type) determines duplication. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Set** — one of Python's 4 built-in collection types; unordered, "unchangeable"* (items can't be modified, but can be added/removed), unindexed, written with `{}`. [S1]
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- **Unordered** — items have no defined order and cannot be accessed by index or key. [S1]
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- **No duplicates** — sets silently drop duplicate values on creation. [S1]
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- **`True`/`1` and `False`/`0` collapse** — these pairs are treated as the same value for duplicate purposes. [S1]
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- **`set()` constructor** — alternative creation syntax. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Value-equality-based dedup, not type-based** — `{True, 1, 2}` collapses to `{True, 2}` (or `{1, 2}`) because `True == 1` in Python, illustrating that set uniqueness follows `==`, not `type()`. [S1]
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## 📖 세부 내용 (Details)
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- Basic creation: `thisset = {"apple", "banana", "cherry"}`. [S1]
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- Duplicate dropped: `thisset = {"apple", "banana", "cherry", "apple"}` → duplicate "apple" ignored. [S1]
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- True/1 collapse: `thisset = {"apple", "banana", "cherry", True, 1, 2}`. [S1]
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- Constructor: `thisset = set(("apple", "banana", "cherry"))`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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소스에서 모순되는 정보는 발견되지 않음. "unchangeable"이라는 표현 자체가 각주(*)로 "제거·추가는 가능하다"고 완화됨. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — Set 연산(union/intersection/difference)은 이후 Join Sets 챕터에서 본격적으로 다뤄진다. [S1]
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## 💻 코드 패턴 (Code patterns)
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True/1 duplicate collapse (Python):
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```python
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thisset = {"apple", "banana", "cherry", True, 1, 2}
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print(thisset) # True and 1 collapse to one value
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.90
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[Python Tutorial]]
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- **관련 개념:** [[Python Lists]], [[Python Frozenset]], [[Python Sets Join]]
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- **참조 맥락:** 4대 컬렉션 타입 중 하나 — 고유값 집합 연산이 필요할 때 사용.
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## 📚 출처 (Sources)
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- [S1] W3Schools — Python Sets — https://www.w3schools.com/python/python_sets.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "Python Sets" page (Astra wiki-curation, P-Reinforce v3.1 format).
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