title: How do I update this Text Box's text in Tkinter?
body: <p>So I am making a stopwatch in python with tkinter,  I have the loop for updating the time working, but I have it so the loop clears the text box, and then updates the text box with the new number.  </p>
  
  <p>Although it doesnt work, for some reason it just doesnt clear it, it just keeps adding numbers to the box.</p>
  
  <p>Here is the code that I have used, if someone would be able to have a look at this for me I would appriciate it a lot :) </p>
  
  <pre><code>import time
  from tkinter import *
  root = Tk()
  root.title("StopWatch")
  
  #textbox for the screen
  screen = Text(root, height = 1, width = 20, bd=10)
  screen.grid(row=0, column=0)
  
  #Active variable
  global stopwatch_active
  stopwatch_active = False
  stop_time = 0
  stop_minutes = 0
  
  
  #command for starting the stopwatch
  def start_com():
      stop_btn.config(state=NORMAL)
      stopwatch_active = True
      start_btn.config(state=DISABLED)
      global stop_time
      stop_time += 1
      screen.insert(END, stop_time)
      root.after(1000, start_com)
  
  
  
  
  #button for starting the stopwatch
  start_btn = Button(root, text = "Start", width = 10, bd = 5, command = start_com)
  start_btn.grid(row=1, column=0, sticky=W)
  
  #button for stopping the stopwatch
  stop_btn = Button(root, text = "Stop", width = 10, bd = 5)
  stop_btn.grid(row=1, column=0, sticky=E)
  stop_btn.config(state=DISABLED)
  </code></pre>