title: Concatenating nested tuples
body: <p>Given two variables </p>
  
  <pre><code>A = (2, 3)
  B = (1, 4), (5, 8)
  </code></pre>
  
  <p>what is the simplest way to concatenate the two into a result variable <code>C</code>, so that:</p>
  
  <pre><code>C = ((2, 3), (1, 4), (5, 8))
  </code></pre>
  
  <p>Note that simply calling:</p>
  
  <pre><code>C = A + B 
  </code></pre>
  
  <p>results in:</p>
  
  <pre><code>C = (2, 3, (1, 4), (5, 8))
  </code></pre>
  
  <p>which is <strong>not</strong> the desired result.</p>
  
  <p>Further, note that tuples are preferred in the place of lists so that <code>A</code>, <code>B</code> and <code>C</code> can be used elsewhere as dictionary keys.</p>