python in nonlocal scope

'' ' 
Nonlocal keyword for the outer layer (non-global) variables in function or other action domains. 
'' ' 
DEF Work (): 
    X = 0 
    DEF new_work (): 
        nonlocal X 
        X = X +. 3 
        return X 
    return new_work 
        
F = Work () 
Print (F ()) 
Print (F ()) 
Print (F ())

 Print results

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())

 Print results

3

6

9

'' ' 
Closure = function + environment variables 
' '' 

DEF dosometing (): 
    A = 25 
    DEF the Add (X): 
        D = A + X 
        return D 
    return the Add 
A = 10 
F = dosometing () 
Print (F (. 5) ) 
Print (F (. 5)) 
Print (F (. 5))

 

 Print results

30

30

30

'' ' 
Closure function + = environment variable 
nonlocal keyword for the outer layer (non-global) variables in function or other action domains. 
'' ' 

DEF dosometing (): 
    A = 25 
    DEF the Add (X): 
        nonlocal A 
        A = A + X 
        return A 
    return the Add 
A = 10 
F = dosometing () 
Print (F (. 5)) 
Print (F (. 5)) 
print (f (5))

 Print results

30

35

40