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Topic_CSS/Topic_HTML/Topic_JavaScript/Topic_Prompt/Topic_Comfyui 등 기존 카테고리 폴더를 정리하고, Topic_Graphic/Dev 등 신규 산출물과 Topics 내부 세션/메모리 기록을 동기화.
71 lines
3.1 KiB
Markdown
71 lines
3.1 KiB
Markdown
---
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id: python-numbers
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title: "Python Numbers"
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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: ["int float complex", "파이썬 숫자"]
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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", "numbers"]
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raw_sources: ["https://www.w3schools.com/python/python_numbers.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[Python Numbers]]
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## 🎯 한 줄 통찰 (One-line insight)
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Python has three numeric types — unbounded-length int, decimal/scientific-notation float, and `j`-suffixed complex — freely convertible into each other except complex, which cannot convert into anything else. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **int** — a whole number, positive or negative, without decimals, of unlimited length. [S1]
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- **float** — a number with one or more decimals; can also use scientific notation (`e`/`E` for powers of 10). [S1]
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- **complex** — written with a `j` suffix for the imaginary part (e.g. `3+5j`). [S1]
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- **Type conversion** — `int()`, `float()`, `complex()` convert between numeric types. [S1]
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- **Complex is a one-way street** — complex numbers cannot be converted into another number type. [S1]
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- **Random numbers** — Python has no built-in `random()` keyword, but the `random` module (`random.randrange(1, 10)`) generates them. [S1]
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## 📖 세부 내용 (Details)
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- Basic declarations: `x = 1 # int`, `y = 2.8 # float`, `z = 1j # complex`. [S1]
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- Scientific notation floats: `x = 35e3; y = 12E4; z = -87.7e100`. [S1]
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- Conversion: `a = float(x); b = int(y); c = complex(x)`. [S1]
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- Random number: `import random; print(random.randrange(1, 10))`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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소스에서 모순되는 정보는 발견되지 않음. complex는 다른 타입으로 변환 불가하다는 예외가 명시적으로 강조됨. [S1]
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — random 모듈은 이후 여러 예제(리스트 셔플, 게임 로직 등)에서 재사용되는 표준 도구다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Random number via the random module (Python):
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```python
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import random
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print(random.randrange(1, 10))
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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 Data Types]], [[Python Casting]], [[Python Math]]
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- **참조 맥락:** 숫자 타입 3종의 기초 — Casting/Math 챕터로 이어진다.
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## 📚 출처 (Sources)
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- [S1] W3Schools — Python Numbers — https://www.w3schools.com/python/python_numbers.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "Python Numbers" page (Astra wiki-curation, P-Reinforce v3.1 format).
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