title: RandomForest Classifier object in arguments
body: <p>I'm currently working on a random forest classifier, using gridsearch to get the best parameters</p>
  
  <p>So when I get my parameters they are in my var : </p>
  
  <pre><code>params = {'bootstrap': 'True', 
            'criterion': 'entropy', 
            'max_depth': 'None', 
            'max_features': '3', 
            'min_samples_leaf': '4', 
            'min_samples_split': '3'}
  </code></pre>
  
  <p>And I would like to do something like that : </p>
  
  <p><code>clf = RandomForestClassifier(params)</code> </p>
  
  <p>But here <code>params</code> take the place of <code>n_estimators</code> so I have some errors like :</p>
  
  <pre><code>ValueError: n_estimators must be an integer, got &lt;class 'dict'&gt;.
  </code></pre>