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최상위 10_Wiki/Topic_*였던 4개 카테고리 폴더를 10_Wiki/Topics/Topic_* 로 재배치. 콘텐츠 변경 없음(순수 폴더 이동) — Topics/ 하위 나머지 폴더는 이미 지난 커밋에서 전부 정리된 상태(잔존 항목은 에이전트 운영 상태 및 사용자가 보존을 요청한 업데이트0615/무제 3.canvas 뿐).
3.1 KiB
3.1 KiB
id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit
| id | title | category | status | verification_status | canonical_id | aliases | duplicate_of | source_trust_level | confidence_score | created_at | updated_at | review_reason | merge_history | tags | raw_sources | applied_in | github_commit | |||||||
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| python-casting | Python Casting | Programming_Language | draft | conceptual |
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B | 0.9 | 2026-07-04 | 2026-07-04 |
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Python Casting
🎯 한 줄 통찰 (One-line insight)
Because Python's primitive types are themselves classes, casting is done through constructor function calls (int(), float(), str()) rather than a dedicated cast syntax, and int() truncates rather than rounds. [S1]
🧠 핵심 개념 (Core concepts)
- Casting via constructors — Python is object-oriented and uses classes even for primitive types, so casting means calling a constructor function. [S1]
int()— builds an integer from an int/float literal (removing decimals) or a string that represents a whole number. [S1]float()— builds a float from an int/float/string literal representing a float or integer. [S1]str()— builds a string from a wide variety of data types. [S1]
🧩 추출된 패턴 (Extracted patterns)
int()truncates, doesn't round —int(2.8)gives2, not3— casting a float to int discards the decimal portion rather than rounding to the nearest integer. [S1]
📖 세부 내용 (Details)
- Integer casting:
x = int(1); y = int(2.8) # 2; z = int("3"). [S1] - Float casting:
x = float(1); y = float(2.8); z = float("3"); w = float("4.2"). [S1] - String casting:
x = str("s1"); y = str(2); z = str(3.0). [S1]
⚖️ 모순 및 업데이트 (Contradictions & updates)
소스에서 모순되는 정보는 발견되지 않음.
🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — Numbers/Variables 챕터에서 이미 예고된 캐스팅 문법이 여기서 상세화된다. [S1]
💻 코드 패턴 (Code patterns)
int() truncates decimals (Python):
x = int(1) # x will be 1
y = int(2.8) # y will be 2 (truncated, not rounded)
z = int("3") # z will be 3
✅ 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 Variables, Python Numbers, Python Data Types
- 참조 맥락: 타입 간 명시적 변환이 필요할 때 사용 — int() 절삭 동작에 유의.
📚 출처 (Sources)
- [S1] W3Schools — Python Casting — https://www.w3schools.com/python/python_casting.asp
📝 변경 이력 (Change history)
- 2026-07-04: Initial draft synthesized from the W3Schools "Python Casting" page (Astra wiki-curation, P-Reinforce v3.1 format).