Tkinter, Python 3.8.1, Win10pro, How Can I Change A Label Image?

This is my VERY first post so forgive my newness. I'm trying to make a GUI of a dice rolling game (2 x six-sided). Logic of the random rolls is working fine to console. Also in

Solution 1:

Since you used local variables to hold the images, they will be garbage collected after the function.

You have to keep the references of the images:

def do_roll():
    die1, die2 = get_roll()

    imgfile1 = get_image(die1)
    imgfile2 = get_image(die2)

    print(imgfile1)
    imgLbl1.image = PhotoImage(file=imgfile1)
    imgLbl1.configure(image=imgLbl1.image)

    print(imgfile2)
    imgLbl2.image = PhotoImage(file=imgfile2)
    imgLbl2.configure(image=imgLbl2.image)

Or declare img1 and img2 as global:

def do_roll():
    global img1, img2

    die1, die2 = get_roll()

    imgfile1 = get_image(die1)
    imgfile2 = get_image(die2)

    print(imgfile1)
    img1 = PhotoImage(file=imgfile1)
    imgLbl1.configure(image=img1)

    print(imgfile2)
    img2 = PhotoImage(file=imgfile2)
    imgLbl2.configure(image=img2)

Solution 2:

Using acw1668's solution above I was able to build upon that to complete my goal of simulating rolls of a pair of dice. Initially, the dice go through 10 random tosses then stop at the tenth as the 'roll'. Each subsequent press of the roll button causes same. My desired programmatic goal was to demonstrate that a label image could be changed multiple times. Here's the code (but you'll have to provide your own images for the 6 sides of the die - sorry, can't download with low creds):

from tkinter import *
import random

def get_roll():
    min=1
    max=6

    die1 = random.randint(min,max)
    die2 = random.randint(min,max)

    if die1 == die2:
        print(die1,'+',die2,'=',die1+die2, '*** You rolled doubles ***')
    else:    
        print(die1,'+',die2,'=',die1+die2)
    return die1,die2

def get_image(index):
    images = []
    images.append('die_01_42158_sm.gif')
    images.append('die_02_42159_sm.gif')
    images.append('die_03_42160_sm.gif')
    images.append('die_04_42161_sm.gif')
    images.append('die_05_42162_sm.gif')
    images.append('die_06_42164_sm.gif')
    return images[index-1]

counter = 0 
def counter_label():
    global counter
    print('counter_label() counter =', counter)
    def count():
        global counter, imgLbl1, imgLbl2

        print('count() counter =', counter)

        print(counter)
        counter += 1
        if counter > 10:
           return

        die1, die2 = get_roll()

        imgfile1 = get_image(die1)
        imgLbl1.image = PhotoImage( file = imgfile1 )
        imgLbl1.configure( image = imgLbl1.image )

        imgfile2 = get_image(die2)
        imgLbl2.image = PhotoImage( file = imgfile2 )
        imgLbl2.configure( image = imgLbl2.image )

        imgLbl1.after(10, count)

    if counter >= 10:
        counter = 0count()

root = Tk()
root.title("Counting Seconds")

imgLbl1 = Label(root)
imgLbl1.pack(side =LEFT)
imgLbl2 = Label(root)
imgLbl2.pack(side =LEFT)

counter_label()

buttonr = Button(root, text='Roll', width=25, command=counter_label)
buttonr.pack()

buttonq = Button(root, text='Stop', width=25, command=root.destroy)
buttonq.pack()

root.mainloop()