title: Python , classify module in NLTK
body: <p>I am taking the ML course at udacity and have the following problem</p>
  
  <pre><code>&gt;&gt;&gt; import nltk    
  &gt;&gt;&gt; from nltk import classify    
  &gt;&gt;&gt; clf = classify(feat_train,lab_train)   
  Traceback (most recent call last):    
    File "(stdin)", line 1, in (module)    
  TypeError: 'module' object is not callable`
  </code></pre>