2nd/10_Wiki/Dev/Topic_Python/Python_VirtualEnv.md

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
python-virtualenv	Python VirtualEnv	Programming_Language	draft	conceptual		venv virtual environment 파이썬 가상환경		B	0.88	2026-07-04	2026-07-04			python programming w3schools venv virtualenv packages	https://www.w3schools.com/python/python_virtualenv.asp

Python VirtualEnv

🎯 한 줄 통찰 (One-line insight)

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]

🧠 핵심 개념 (Core concepts)

• Virtual environment — an isolated environment for running/testing a Python project; own interpreter, own packages, isolated from other environments. [S1]
• Why use it — prevents package version conflicts between projects, improves portability/reproducibility, keeps the system Python clean, allows testing with different Python versions. [S1]
• venv module — built-in tool for creating virtual environments: python -m venv myfirstproject. [S1]
• Activation — myfirstproject\Scripts\activate (Windows) changes the prompt to show the active environment. [S1]
• Installing packages — once activated, pip install <package> installs ONLY into that environment. [S1]
• Deactivation — deactivate returns to the normal command line. [S1]
• Deletion — simply delete the folder; no other project depends on it. [S1]

🧩 추출된 패턴 (Extracted patterns)

• 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]

📖 세부 내용 (Details)

• Create: python -m venv myfirstproject. [S1]
• Activate (Windows): myfirstproject\Scripts\activate. [S1]
• Install a package inside: pip install cowsay. [S1]
• Run a script using it: python test.py. [S1]
• Deactivate: deactivate. [S1]
• Delete: rmdir /s /q myfirstproject. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — Python PIP 챕터의 패키지 설치가 여기서 프로젝트별로 격리된 형태로 확장된다. [S1]

💻 코드 패턴 (Code patterns)

Create, activate, and install in isolation (shell):

python -m venv myfirstproject
myfirstproject\Scripts\activate
pip install cowsay

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.88
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: Python Tutorial
• 관련 개념: Python PIP, Python Modules
• 참조 맥락: 프로젝트별 의존성 격리의 표준 도구 — PIP 설치를 프로젝트 범위로 한정.

📚 출처 (Sources)

• [S1] W3Schools — Python Virtual Environment — https://www.w3schools.com/python/python_virtualenv.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "Python Virtual Environment" page (Astra wiki-curation, P-Reinforce v3.1 format).