Clear list inside decorator from global scope

January 29, 2023

def outer(func):
    a = []

    def inner():
        func()
        a.append('work')
        print(a)
    return inner


@outer
def test():
    print('TEST')


test()
test()

# *1

test() # *2

*1 here I want clear list a inside a decorator
*2 so here must be a new list a inside outer

Is it posible to clear list a, in global scope? If yes, how do it correct.

>Solution :

You can add a parameter to the wrapper function specifying whether to clear a before/after the original function executes.

def outer(func):
    a = []

    def inner(clear=False):
        func()
        a.clear() if clear else a.append('work')
        print(a)
    return inner

@outer
def test():
    print('TEST')

test()
test(clear=True)
# *1
test() # *2

Result: