title: Repeatable tkinter button command...?
body: <p>Basically, here is the problem</p>
  
  <p>All of the user interface is within a tkinter message box.
  I have a program which the user inputs a string into a variable. String is checked if it is an integer. If yes; print this is an int, if no, launch another message box with a warning message, and an 'ok' button will be displayed.</p>
  
  <p>This is the problem</p>
  
  <p>I have written the code for the whole thing so far, below is the code for the warning message box:</p>
  
  <pre><code>from Tkinter import *
  __author__ = 'Super'
  
  def close_program():
      root.destroy()
  
  
  def number_checker():
      global vehicle_distance
      global vehicle_time
      try:
      vehicle_distance = float(vehicle_distance)
      correct_text_distance()
  except ValueError:
      failed_text_distance()
  try:
      vehicle_time = float(vehicle_time)
      correct_text_time()
  except ValueError:
      failed_text_time()
  
  
  def failed_text_time():
      global root
      root = Tk()
      root.title("Fatal Error")
      root.geometry("300x30")
  
      error_label = Label(root, text="Please input an integer for the field 'time'")
      error_label.pack()
  
      ok_button = Button(root, text="Ok", command=close_program)
      ok_button.pack()
      root.mainloop()
  </code></pre>
  
  <p>When the 'ok' button is pressed, the warning window closes, but when I re enter the values, and press the enter button again, it runs through the integer checker, then goes to deploy the warning message, and fails......</p>
  
  <p><code>
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 2036, in __init__
      (widgetName, self._w) + extra + self._options(cnf))
  TclError: can't invoke "label" command:  application has been destroyed
  </code></p>
  
  <p>I don't know why it doesn't want to launch that same message box again... It might have something to do with the 'Application has been destroyed'....</p>
  
  <p>If anyone could help, that would be very useful</p>