title: Python: universal import
body: <p>Can anyone explain which 'import' is universal, so I don't need to write for example:</p>
  
  <pre><code>from numpy import *
  import numpy
  import numpy as np
  from numpy.linalg import *
  </code></pre>
  
  <p>Why not <code>import numpy</code> or <code>from numpy import *</code> to incude all from "numpy"?</p>