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Question

I am trying to make a button that when clicked updates the number on a label. What I am trying to accomplish is that when someone scores a goal, you can click the Goal! button and it will update the teams score.

import sys
from tkinter import *

root = Tk()

class team1:
score = 0

def goal(self):
    self.score += 1
    team1_attempt.set(text = self.score)

team1 = team1()

team1_attempt = Label(text = team1.score).pack()
team1_button = Button(text="Goal!", command = team1.goal).pack()

Hope someone can help! New to python.

Answer 1

You have two problems with your code.

First problem:

team1_attempt = Label(text = team1.score).pack()

This sets team1_attempt to None , because pack(0 returns None . If you want to save a reference to a widget so you can interact with it later you must do widget creation and widget layout in two steps.

Second problem:

team1_attempt.set(text = self.score)

To change an attribute of a widget, use the configure method. I don't know what documentation you read that says to call set on a label widget, but that documentation is wrong. Use configure , like so:

test1_attempt.configure(text=self.score)

Answer 2

Instead of using a label, try using an Entry widget that inserts the score into the Entry widget. For example:

class test:
    def __init__(self, master):
        self.goalButton = Button(master,
                                 text = "goal!",
                                 command = self.goalUpdate)
        self.goalButton.pack() 
        self.goalDisplay = Entry(master,
                                 width = 2)
        self.goalDisplay.pack()
        self.score = 0
    def goalUpdate(self):
          self.goalDisplay.delete(1.0, END) # Deletes whatever is in the score display
          score = str(self.score)
          self.goalDisplay.insert(0, score) # Inserts the value of the score variable