Is there a way to detect either up or down mouse wheel scrolling?

[YuATools]

I am writing a script that needs to be triggered by each scroll up and down.

mode = int(mode)
if mode == 1:
    a_key = 1
    b_key = #scroll down
elif mode == 2:
    a_key = -1
    b_key = #scroll up
else:
    sys.exit()

while True:
    if keyboard.is_pressed(key)
        while a < 30:
            mouse.wheel(a_key)
            time.sleep(1)
    if |**scroll detect**| (b_key)
        while a < 30:
            mouse.wheel(a_key)
            time.sleep(1)

The full script looks like this
I want to detect the top and bottom at this "Scroll detect" part.
Since it is not allowed to scroll in the same direction as a_key, we can use other modules than the mouse module, but we prefer the mouse module as much as possible.
Please help me.