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Python

Scope Lifetime

Scope Lifetime¶

Local Scope¶

1. Function Call¶

def function():
    x = 10  # Created at call
    return x
    # Destroyed after return

result = function()
# x no longer exists

2. Frame Lifetime¶

def outer():
    x = 10

    def inner():
        return x

    return inner
    # Frame ends but x kept for closure

f = outer()
print(f())  # x still accessible

Global Scope¶

1. Module Lifetime¶

# Exists for program lifetime
x = 10

def function():
    print(x)

# x available throughout

Summary¶

Local: function call duration
Enclosing: kept if captured
Global: program lifetime
Built-in: always available