title: change multiple array values to a value
body: <p>I'm new at programming (using python) and have a simple question. 
  I have this list containing different elements</p>
  
  <pre><code>tegn = ["a", "b", "c"]
  </code></pre>
  
  <p>and another list</p>
  
  <pre><code>guess = ["a", "c", "c"]
  </code></pre>
  
  <p>I want the guess list to change to ["a", "a", "a"]. My attempt is:</p>
  
  <pre><code>guess[-2:] = tegn[0]
  </code></pre>
  
  <p>But that makes it ["a", "a"], thus removing an element. How do I do it without removing an element?</p>
  
  <p>EDIT:</p>
  
  <p>the guess list will change a lot during the program, since I'm making a brute force method to guess a string. So guess wil be ["a"], ["b"], ["c"] where it goes ["a", "a"], ["a", "b"] and so on</p>