import time


def timer(f):
    def subfunc(*args, **kwargs):

        t = time.time()
        res = f(*args, **kwargs)
        res_3 = (time.time() - t)
        
        mylist = [args[0].__name__, args[1], res_3]
        print(mylist)
        return res

    return subfunc

@timer
def myfunc(expression, i=1000, sleep=2, args=[]):
    time.sleep(sleep)
    
    res_1 = expression(j for j in range(1, 10001))
    res_2 = res_1 * i

    return res_2

myfunc(sum, 20000)
myfunc(min, 20000)

def get_path_file(instance, filename):
    category = instance.category.name
    name = instance.name
    return os.path.join('products_images', category, name[:25], filename)

cover = models.ImageField(upload_to=get_path_file, null=False)