Depends on how you're wanting to access them. An infinite loop works well.
_clicks = 0
while True:
if _clicks != clicks:
_clicks = clicks
print(_clicks)
But you'll almost certainly have to put that in another thread.
from threading import Thread
def notifier():
global clicks # whatever variable you're accessing
while True:
if _clicks != clicks:
_clicks = clicks
print(_clicks)
t = Thread(target=notifier)
t.start()