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78 lines
3.6 KiB
Markdown
78 lines
3.6 KiB
Markdown
---
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id: python-virtualenv
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title: "Python VirtualEnv"
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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: ["venv", "virtual environment", "파이썬 가상환경"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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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", "venv", "virtualenv", "packages"]
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raw_sources: ["https://www.w3schools.com/python/python_virtualenv.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[Python VirtualEnv]]
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## 🎯 한 줄 통찰 (One-line insight)
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A virtual environment is a self-contained folder with its own interpreter and packages — deleting the whole folder cleanly removes it with zero side effects on other projects or the system Python, since nothing outside the folder ever depended on it. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Virtual environment** — an isolated environment for running/testing a Python project; own interpreter, own packages, isolated from other environments. [S1]
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- **Why use it** — prevents package version conflicts between projects, improves portability/reproducibility, keeps the system Python clean, allows testing with different Python versions. [S1]
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- **`venv` module** — built-in tool for creating virtual environments: `python -m venv myfirstproject`. [S1]
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- **Activation** — `myfirstproject\Scripts\activate` (Windows) changes the prompt to show the active environment. [S1]
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- **Installing packages** — once activated, `pip install <package>` installs ONLY into that environment. [S1]
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- **Deactivation** — `deactivate` returns to the normal command line. [S1]
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- **Deletion** — simply delete the folder; no other project depends on it. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Package isolation demonstrated by failure** — running a script that imports a venv-only package OUTSIDE the activated venv raises `ModuleNotFoundError`, concretely proving the isolation works. [S1]
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## 📖 세부 내용 (Details)
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- Create: `python -m venv myfirstproject`. [S1]
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- Activate (Windows): `myfirstproject\Scripts\activate`. [S1]
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- Install a package inside: `pip install cowsay`. [S1]
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- Run a script using it: `python test.py`. [S1]
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- Deactivate: `deactivate`. [S1]
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- Delete: `rmdir /s /q myfirstproject`. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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소스에서 모순되는 정보는 발견되지 않음.
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — Python PIP 챕터의 패키지 설치가 여기서 프로젝트별로 격리된 형태로 확장된다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Create, activate, and install in isolation (shell):
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```
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python -m venv myfirstproject
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myfirstproject\Scripts\activate
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pip install cowsay
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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:** 0.88
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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 PIP]], [[Python Modules]]
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- **참조 맥락:** 프로젝트별 의존성 격리의 표준 도구 — PIP 설치를 프로젝트 범위로 한정.
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## 📚 출처 (Sources)
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- [S1] W3Schools — Python Virtual Environment — https://www.w3schools.com/python/python_virtualenv.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "Python Virtual Environment" page (Astra wiki-curation, P-Reinforce v3.1 format).
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