title: Link different python files with button click using tkinter python 3.4
body: <p>I have multiple files in my project. i want to link different python script with the button click in gui programming.</p>
  
  <pre><code>from tkinter import *
  
  root=Tk()
  two=Button(root,text="button")
  
  
  root.mainloop()
  </code></pre>
  
  <p>like i have:</p>
  
  <pre><code> 1.classes.py  
   2. gui.py 
   3. final.py ..etc in my project directory
  </code></pre>
  
  <p>with the button click i like to open another python file in GUI form 
  Example: i like to open classes.py with the button click.</p>