函数嵌套:
第一种嵌套方法
def func():
count = 123
def inner():
print(count)
inner()
func()
第二种嵌套方法
count = 123
def func_1():
print(count) def func_2():
func_1()
func_2()
1. global
count = 0
def func1():
global count #把count变量变成全局变量,这样才可以修改,因为count在局部函数中没有定义
count = count + 1
print(count)
func1()
print(count)
2 . nonlocal
def func2():
count = 0
def func3():
nonlocal count #子函数对父函数的变量进行修改,不然的话就只能引用父函数变量不能修改
count = count + 1
print(count)
func3()
print(count)
func2()