2nd/10_Wiki/Dev/Topic_Python/Python_Global_Variables.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-global-variables	Python Global Variables	Programming_Language	draft	conceptual		global keyword 파이썬 전역 변수		B	0.9	2026-07-04	2026-07-04			python programming w3schools variables scope global	https://www.w3schools.com/python/python_variables_global.asp

Python Global Variables

🎯 한 줄 통찰 (One-line insight)

A variable created outside any function is global and visible everywhere, but assigning to a same-named variable inside a function creates a separate local shadow — unless the global keyword explicitly binds it to the outer scope. [S1]

🧠 핵심 개념 (Core concepts)

• Global variable — created outside a function; usable both inside and outside functions. [S1]
• Shadowing — creating a same-named variable inside a function makes it local to that function; the global variable of the same name is untouched. [S1]
• global keyword — declares that a variable inside a function refers to the global scope, both for creating and for modifying it. [S1]

🧩 추출된 패턴 (Extracted patterns)

• Local-by-default assignment — assignment inside a function is local unless global is explicitly declared, which is a common source of confusion for beginners expecting the outer variable to change. [S1]

📖 세부 내용 (Details)

• Read a global variable inside a function: x = "awesome"; def myfunc(): print("Python is " + x); myfunc(). [S1]
• Shadowing (local wins inside the function, global unaffected outside): x = "awesome"; def myfunc(): x = "fantastic"; print("Python is " + x); myfunc(); print("Python is " + x) — prints "fantastic" then "awesome". [S1]
• Using global to modify the outer variable: x = "awesome"; def myfunc(): global x; x = "fantastic"; myfunc(); print("Python is " + x) — prints "fantastic" after the call. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — Python Scope 챕터에서 지역/전역 범위 규칙이 더 체계적으로 다뤄진다. [S1]

💻 코드 패턴 (Code patterns)

Modify a global variable inside a function (Python):

x = "awesome"
def myfunc():
    global x
    x = "fantastic"

myfunc()
print("Python is " + x)

✅ 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 Scope, Python Functions
• 참조 맥락: 함수 내부/외부 변수 범위 규칙의 기초 — Scope 챕터에서 더 체계적으로 확장.

📚 출처 (Sources)

• [S1] W3Schools — Python - Global Variables — https://www.w3schools.com/python/python_variables_global.asp

📝 변경 이력 (Change history)

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