1 ，例子 ：
代码 ：
def closure():
a=0
def jia():
nonlocal a
a=a+1
def jian():
nonlocal a
a=a-1
def show():
print(a)
return jia,jian,show
if __name__ == '__main__':
jia,jian,show=closure()
jia()
show()
jian()
show()
=====================
1
0
Processed:
0.031, SQL:
10
