Python：nolocal 和 global

# nolocal 和 global的不同，nolocal改变的是上级作用域里的变量，global改变的是全局作用域里的变量

# global
name = 'xueyou'


def outer():
    name = 'dehua'

    def inner():
        global name  # 将全局作用域里的name值更改，也即xueyou变成fucheng
        name = 'fucheng'

    inner()
    print(name)  # 作用域里的name值未变


outer()  # dehua
print(name)  # fucheng

# nolocal
name = 'xueyou'


def outer():
    name = 'dehua'

    def inner():
        nonlocal name  # 将上级作用域里的name值更改，也即dehua变成fucheng
        name = 'fucheng'

    inner()
    print(name)  # fucheng


outer()  # fucheng
print(name)  # 全局作用域的变量未改，输出xueyou