title: Print letter by letter using Tkinter
body: <p>Is there a way to print letter by letter (redraw between frame update) in Python 3.4.1 using Tkinter?</p>
  
  <p>This is doable in the normal IDLE window using this piece of code:</p>
  
  <pre><code>import time
  string = "hello world"
  for char in string:
      print(char, end='')
      time.sleep(.25)
  </code></pre>
  
  <p>But I can't do this in GUI Tkinter window. In my opinion, I could display a label on to the tkinter window, add a letter from a string into it, and wait for a period of time before adding another letter (about 0.25 secs), with the same idea as the code above. 
  Any solutions?</p>
  
  <p>For example:</p>
  
  <p><strong>String To Display</strong> = 'abc'</p>
  
  <p><em>First</em> frame : 'a'</p>
  
  <p><em>Second</em> frame : 'ab'</p>
  
  <p><em>Third</em> Frame : 'abc'</p>
  
  <p>Thanks in advance!</p>