Tkinter GUI counter not counting Python

Question

My program should be a very simple counter, but yet m not able to figure why it is not counting when the button clicked.

from tkinter import *

class Counter:

    def __init__(self):
        
        self.__value = 0
        self.__main_window = Tk()

        self.__current_value = Label(self.__main_window, text=self.__value)
        self.__current_value.pack()
        
        self.__increase_button = Button(self.__main_window, text='Increase',
                                        command=self.increase)

    def increase(self):
        self.__value += 1

def main():

    Counter()


if __name__ == "__main__":
    main()

Answer 1

The text configuration of a Label in tkinter is not auto-updating. The value stored in the self.__value variable is evaluated and displayed as the label.

Subsequent changes to the value of self.__value will not be reflected in the GUI.

When you update the self.__value variable you will also want to reconfigure the self.__current_value label to reflect these changes. You can update your increase method to reconfigure the label like so

def increase(self):
    self.__value += 1
    self.__current_value.config(text=self.__value)