Python LCD Code

import Adafruit_CharLCD as LCD
import RPi.GPIO as GPIO # Import Raspberry Pi GPIO library
from time import sleep

#Some code i use in my other python file to use the screen, found on a website
# Raspberry Pi pin setup
rs = 25
en = 24
d4 = 23
d5 = 17
d6 = 18
d7 = 22
backlight = 2
#buttonPin=26

# Define LCD column and row size for 16x2 LCD.
columns = 8
rows = 1
GPIO.setmode(GPIO.BCM)
lcd = LCD.Adafruit_CharLCD(rs,en,d4,d5,d6, d7,columns,rows,backlight)

####test##

GPIO.setmode(GPIO.BCM) #This is here twice, might remove one later

## Code from raspberrypihq.com modified by Kelson

def button_callback(channel):
    #print("Button was pushed!")
    #Modified code prints "Hello!" in a scrolling fashion.. H clear e clear.. so on.
    lcd.message("H")
    lcd.clear()
    lcd.message("e")
    lcd.clear()
    lcd.message("l")
    lcd.clear()
    lcd.message("l")
    lcd.clear()
    lcd.message("o")
    lcd.clear()
    lcd.message("!")

GPIO.setwarnings(False) # Ignore warning for now

GPIO.setup(26, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 26 to be an input pin and set initial value to be pulled low (off)

GPIO.add_event_detect(26,GPIO.RISING,callback=button_callback) # Setup event on pin 10 rising edge

message = input("Press enter to quit\n\n") # Run until someone presses enter

GPIO.cleanup() # Clean up
#lcd.clear()  #unused code