title: List containing only every second second pair of elements
body: <p>I am new to python and so I am experimenting a little bit, but I have a little problem now.</p>
  <p>I have a list of <em>n</em> numbers and I want to make a new list that contains only every <strong>second pair</strong>  of the numbers.</p>
  <p>So basically if I have list like this</p>
  <pre class="lang-py prettyprint-override"><code>oldlist = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  </code></pre>
  <p>then I want that the new list looks like this</p>
  <pre class="lang-py prettyprint-override"><code>newlist = [3, 4, 7, 8]
  </code></pre>
  <p>I already tried the <code>slice()</code> function, but I didn't find any way to make it slice my list into pairs. Then I thought that I could use two <code>slice()</code> functions that goes by four and are moved by one, but if I merge these two new lists they won't be in the right order.</p>