title: can't use scikit-learn - "AttributeError: 'module' object has no attribute ..."
body: <p>I'm trying to follow <a href="http://scikit-learn.org/0.13/auto_examples/linear_model/plot_ols.html#example-linear-model-plot-ols-py" rel="noreferrer">this tutorial</a> of scikit-learn (linear regression).</p>
  
  <p>I've installed scikit through <code>pip install -U scikit-learn</code>, I use python 2.7 and Ubuntu 13.04</p>
  
  <p>When I try to run the first lines of code there I get an error and it happens every time I'm trying to run anything with scikit-learn.</p>
  
  <pre><code>import pylab as pl
  import numpy as np
  from sklearn import datasets, linear_model
  
  # Load the diabetes dataset
  diabetes = datasets.load_diabetes()
  </code></pre>
  
  <p>I get the following: </p>
  
  <pre><code>AttributeError: 'module' object has no attribute 'load_diabetes'
  </code></pre>
  
  <p>When I try:</p>
  
  <pre><code>regr = linear_model.LinearRegression()
  </code></pre>
  
  <p>I get :</p>
  
  <pre><code>AttributeError: 'module' object has no attribute 'LinearRegression'
  </code></pre>
  
  <p>It seems to me that it's either I'm using the package wrong (but I've copied from their tutorial), or I've installed something wrong (but the package is loaded successfully).</p>
  
  <p>Can anyone help?</p>