title: python assign list to tk stringvar
body: <p>I'm having some trouble with stringVars from TK. </p>
  
  <pre><code>from tkinter import *
  
  root = Tk()
  strVar = StringVar()
  tmp1 = ['one','two','three']
  print(tmp1)
  print(len(tmp1))
  
  strVar.set(tmp1)
  tmp2=strVar.get()
  print(tmp2)
  print(len(tmp2))
  </code></pre>
  
  <p>Output is:</p>
  
  <pre><code>['one', 'two', 'three'] 
  3
  ('one', 'two', 'three')
  23
  </code></pre>
  
  <p>As you can see, the format is different. Obviously, the list of strings is internally converted into one string with quotes. What ist the reason and how can I avoid it? For my script I would like to have a list of strings for further processing.</p>