title: Creating scikit learn objects
body: <p>Want to creat objects like:</p>
  
  <pre><code>regr = linear_model.LinearRegression()
  </code></pre>
  
  <p>with: </p>
  
  <pre><code>GaussianNB()
  SVC() 
  svm.SVR()
  DecisionTreeClassifier()
  </code></pre>
  
  <p>For example, for:</p>
  
  <pre><code>from sklearn.naive_bayes import GaussianNB
  gaussian = naive_bayes.GaussianNB()
  </code></pre>
  
  <p>I get:</p>
  
  <pre><code>NameError: name 'naive_bayes' is not defined
  </code></pre>
  
  <p>For:</p>
  
  <pre><code>from  sklearn.tree import DecisionTreeClassifier
  treeclassifier = tree.DecisionTreeClassifier()
  </code></pre>
  
  <p>I get:</p>
  
  <pre><code>NameError: name 'tree' is not defined
  </code></pre>
  
  <p>Thanks in advance</p>