Take action when the cursor position crosses a particular x value

Question

Here is my situation

import win32api

while True:
    x,y = win32api.GetCursorPos()
    if x < 0:
        print("2")
    else:
        print("1")

This constantly prints '1' or '2' depending on the x co-ordinate of the mouse being less than 0 (dual monitors, RHS is primary so < 0 means mouse is on second monitor). How can I make it only print one instance of the string '1' or '2' when x becomes < 0 or x becomes >= 0?

Answer 1

You need to remember the last state printed so that you can detect when a new state is entered.

last_state = False
while True:
    x,y = win32api.GetCursorPos()
    state = x < 0
    if state == last_state:
        continue
    last_state = state
    if state:
        print("2")
    else:
        print("1")