Python作用域和循环混淆

def example_function():
    for i in range(3):
        x = i * 2
        print(f"Inside loop: x = {x}")
    
    # 尝试在循环外部访问变量 x
    print(f"Outside loop: x = {x}")  # 这里会报错，因为 x 是局部变量

example_function()

def example_function():
    x = None  # 在循环外部定义变量 x
    for i in range(3):
        x = i * 2
        print(f"Inside loop: x = {x}")
    
    print(f"Outside loop: x = {x}")  # 现在可以正常访问 x

example_function()

def outer_function():
    x = 0
    def inner_function():
        nonlocal x  # 声明 x 是外部函数的变量
        for i in range(3):
            x += i
            print(f"Inside inner loop: x = {x}")
    
    inner_function()
    print(f"Outside inner loop: x = {x}")

outer_function()