title: ImportError: No module named sklearn.datasets
body: <p>os: mac os yosemite<br>
  python: 2.7.6 --  64-bit<br>
  installed: numpy,skipy,matplotlib,nose  </p>
  
  <p>I get the following error.</p>
  
  <pre><code>&gt;&gt;&gt; from sklearn.datasets import load_iris
  
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  ImportError: No module named sklearn.datasets
  
  $ pip install --user --install-option="--prefix=" -U scikit-learn
  Requirement already up-to-date: scikit-learn in /Library/Python/2.7/site-packages
  Cleaning up...
  </code></pre>
  
  <p>Someone help me please!</p>