title: add value to each element in array python
body: <p>I have an array like this</p>
  
  <pre><code>a= np.arange(4).reshape(2,2)
  
  array([[0, 1],[2, 3]])
  </code></pre>
  
  <p>I want to add a value to each element in the array. I want my result return 4 array like</p>
  
  <pre><code>array([[1, 1],[2, 3]])
  
  array([[0, 2],[2, 3]])
  
  array([[0, 1],[3, 3]])
  
  array([[0, 1],[2, 4]])
  </code></pre>