title: Python Numpy add 3 arrays in one array
body: <p>I'm quite new in Numpy and I don´t know how to solve this problem.</p>
  
  <p>I have these arrays:</p>
  
  <pre><code>one = np.array(np.ones(3))   --&gt; [ 1.  1.  1.]
  two = np.array(np.zeros(3))  --&gt; [ 0.  0.  0.]
  three = np.array([1,2,3]) --&gt;    [ 1  2  3]
  </code></pre>
  
  <p>I would like to create an array that holds these three arrays in this way:</p>
  
  <pre><code>[[ 1.  1.  1.]
   [ 0.  0.  0.]
   [ 1.  2.  3.]]
  </code></pre>
  
  <p>thanks</p>