title: Manipulating python lists. (accessing specific elements)
body: <p>I am a filling a list (named foo) in this way:</p>
  
  <pre><code>foo = []
  
  for index, elem in enumerate(alpha):
      if elem&gt;0.00001:
          print (index,elem)
          foo.append([elem, myarray[index]])
  </code></pre>
  
  <p>Now, lets see what <code>foo[0]</code> contains:</p>
  
  <pre><code>output: [14601132722.531921, array([ 0.6135447, -0.874145 , -1.       ])
  </code></pre>
  
  <p>I really want to be able to access somehow every single of these values for further processing. So far I have got every single possible error this python language can produce.</p>
  
  <p>Or better, to store these values in a normal <code>Nx4</code> matrix or array whatever they call it in python.</p>