python中nonlocal的作用
作者:互联网
python中nonlocal关键字
'''
nonlocal关键字用来在函数或其他作用域中使用外层(非全局)变量。
'''
def work():
x = 0
def new_work():
nonlocal x
x += 3
return x
return new_work
f=work()
print(f())
print(f())
print(f())
# 运行结果:
3
6
9
'''
使用global 实现
'''
a =0
def new_work():
global a
a=a+3
return a
print(new_work())
print(new_work())
print(new_work())
# 运行结果:
3
6
9
def dosometing():
a =25
def add(x):
d=a+x
return d
return add
a = 10
f=dosometing()
print(f(5))
print(f(5))
print(f(5))
# 运行结果
30
30
30
'''
闭包= 函数+环境变量
nonlocal关键字用来在函数或其他作用域中使用外层(非全局)变量。
'''
def dosometing():
a =25
def add(x):
nonlocal a
a=a+x
return a
return add
a = 10
f=dosometing()
print(f(5))
print(f(5))
print(f(5))
# 运行结果:
30
35
40
标签:return,python,work,nonlocal,def,print,new,作用 来源: https://www.cnblogs.com/jessecheng/p/14851162.html