How do I code a toggle-able variable with a button in Python

Question

I have this code here. All it does is when I have a button I've wired in pushed down, it prints "Button Pressed" every .3 seconds. I've tried everything, and I can't figure out for the life of me how to make it so this button toggles a variable between True and False, or 0,1 , etc... I'd really appreciate some help. Thanks

 import  RPi.GPIO as GPIO
import time


GPIO.setmode(GPIO.BCM)
GPIO.setup(18, GPIO.IN,pull_up_down=GPIO.PUD_UP)


while True:
    inputValue = GPIO.input(18)
    if (inputValue == False):
        print("Button press ")
    time.sleep(0.3)

Something exactly like this:

https://www.youtube.com/watch?v=PH3hNLXxNeE

Answer 1

You want to know if the state of the button has changed.

You need to keep track of the state and compare it when you get a new value from the GPIO.

latest_state = None

while True:
    inputValue = GPIO.input(18)
    if inputValue != latest_state:
        latest_state = inputValue
        if latest_state:
            print("Button pressed")
        else:
            print("Button depressed")
    time.sleep(0.3)