Displays statistics about our LM

def display(self):
        '''
        Displays statistics about our LM
        '''
        voc_list = []
        doc_ids = self.term_count_n.keys()
        doc_ids.sort()
        for doc_id in doc_ids:
            ngrams = len(self.term_count_n[doc_id]['ngrams'])
            print 'n-Grams (doc %s): %d' % (str(doc_id), ngrams)
            ngrams1 = len(self.term_count_n_1[doc_id]['ngrams'])
            print '(n-1)-Grams (doc %s): %d' % (str(doc_id), ngrams1)
            voc_list.append(ngrams)
        print 'Classed Vocabularies:', voc_list
        print ''
        corpus_ngrams = len(self.corpus_count_n['ngrams']) 
        print 'n-Grams (collection): %d' % (corpus_ngrams)
        corpus_ngrams1 = len(self.corpus_count_n_1['ngrams']) 
        print '(n-1)-Grams (collection): %d' % (corpus_ngrams1)
        self.unseen_counts.display()