title: How to ask user to input FOLDER PATH in Tkinter Python 2.7
body: <p>I would like to know how to allow user to key in a folder path, so that when user key in the folder path, it will load all the text file in the folder. However, I would like to do this is Tkinter.</p>
  
  <p>I understand that by using Python IDLE, the code is <code>raw_input</code>. I did some search about using it on tkinter, it stated that use something like <code>ask_directory</code>. </p>
  
  <p>I tried to google <code>ask_directory</code>, however, I couldn't find any source of help on this.</p>
  
  <p>Could anyone help me out regarding this?</p>
  
  <p>On how to ask user to key in path folder and loop through every files in the folder.</p>