Why start button is not performing the counter functionality

Question

from tkinter import *
import tkinter as tk

Creating a counter

def a():    

    def counter_label(label):            
        counter=         


        

Answer 1

In function a() you never actually call the counter_label, so it doesn't start the count. And you need to define counter variable outside of the function so that you can use global keyword.

Here is your code modified:

from tkinter import *
import tkinter as tk

counter = 0                             #Defining counter so you can use it with global
def a():    
    def counter_label(label):            
        counter=0
        def count():
            global counter
            counter += 1
            label.config(text=str(counter))
            label.after(1000,count)
        count()

    label=tk.Label(frame,fg="red")
    label.grid(row=0,column=1)
    counter_label(label)                #Calling the counter_label function

...