# -*- coding: UTF-8 -*-


###============ 函数声明全局变量 ============###

# n = 10

# def foo():
#     global n  # 需要声明一下是全局
#     print(n)
#     n += 1 # 局部修改全局，需要声明一下
#     print(n)
    
# foo()

###============ 闭包情况下 ============###

def foo():
    n = 10
    def func():
        nonlocal n 
        print(n)
        n += 1
    func()
foo()