---
id: python-variable-names
title: "Python Variable Names"
category: "Programming_Language"
status: "draft"
verification_status: "conceptual"
canonical_id: ""
aliases: ["Camel Case", "Pascal Case", "Snake Case", "파이썬 변수명 규칙"]
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", "variables", "naming"]
raw_sources: ["https://www.w3schools.com/python/python_variables_names.asp"]
applied_in: []
github_commit: ""
---

# [[Python Variable Names]]

## 🎯 한 줄 통찰 (One-line insight)
A legal Python variable name must start with a letter or underscore, contain only alphanumerics/underscores, avoid Python keywords, and is always case-sensitive — with Camel/Pascal/Snake case as the three common multi-word naming conventions. [S1]

## 🧠 핵심 개념 (Core concepts)
- **Naming rules** — must start with a letter or `_`; cannot start with a number; only alphanumeric characters and underscores allowed; case-sensitive; cannot be a Python keyword. [S1]
- **Legal examples** — `myvar`, `my_var`, `_my_var`, `myVar`, `MYVAR`, `myvar2`. [S1]
- **Illegal examples** — `2myvar` (starts with digit), `my-var` (hyphen), `my var` (space). [S1]
- **Camel Case** — `myVariableName` (first word lowercase, rest capitalized). [S1]
- **Pascal Case** — `MyVariableName` (every word capitalized). [S1]
- **Snake Case** — `my_variable_name` (words separated by underscores). [S1]

## 📖 세부 내용 (Details)
- Legal names: `myvar = "John"`, `_my_var = "John"`, `myVar = "John"`. [S1]
- Illegal names: `2myvar`, `my-var`, `my var`. [S1]
- Three multi-word conventions: Camel/Pascal/Snake case, each solving readability differently. [S1]

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

## 🛠️ 적용 사례 (Applied in summary)
현재 발견된 실제 적용 사례가 없습니다 — Snake Case는 Python 커뮤니티의 사실상 표준 변수/함수 명명 관례로 이후 모든 예제에서 암묵적으로 따라진다. [S1]

## 💻 코드 패턴 (Code patterns)
Three naming conventions (Python):
```python
myVariableName = "John"   # Camel Case
MyVariableName = "John"   # Pascal Case
my_variable_name = "John" # Snake Case
```

## ✅ 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 Assign Multiple Values]]
- **참조 맥락:** 변수명 작성 규칙 — Snake Case가 Python 관례상 사실상 표준.

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

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