title: Cannot append list to a list?
body: <p>I can't find this question elsewhere on StackOverflow, or maybe my researching skills are not advanced enough, so I am asking now:</p>
  
  <p>So I was playing around with Python today after not having touched it in a while and I found that the following snippet of code does not work:</p>
  
  <pre><code>&gt;&gt;&gt; list1 = [1,2,3]
  &gt;&gt;&gt; list2 = [4,5,6]
  &gt;&gt;&gt; list3 = list1.append(list2)
  &gt;&gt;&gt; list3
  </code></pre>
  
  <p>Why does the last line not produce any results?</p>
  
  <p>Also, I'm using Python 2.7.3, if that makes any difference</p>